Introduction to functions

[@angryappendix6306]

If it weren't for Khan Academy, I probably wouldn't have gotten into Berkeley to study Physics. All throughout middle and high school, I hated math, but now I absolutely adore math and I'll even do math in my free time. I am forever thankful Sal, thank you so much. I still remember watching this video from 9th grade.

[@lasselarsen9169]

Guess we cant be bombastic at everything then.

[@angryappendix6306]

Lasse Larsen I changed my account to Biggie Cheese just recently. That comment was from a month ago

[@Adam9130cs]

*starts freestyling* nice meme

[@angryappendix6306]

memedreamer420 thx

[@angryappendix6306]

Rushil Patel In high school, I've learned that just forcing yourself to do the work and studying whether you want to or not is the best way to go. I did a lot of volunteering and extra curriculars. I also participated in some state competitions for math and science.

[@jlpetty85]

I actually thought the sal(food) and sal(poison) examples helped me understand what the idea behind functions is. Thank you

[@vlvt-things]

u low key want sal to die smh

[@aluixkun]

@@vlvt-things Fr

[@yihjiinglim]

Your teaching methods are way more interesting than teachers in school or tuition. Just a 9 minutes explanation video like this is better than a 2 hours of tuition. You just made me feel like maths is an interesting thing to do. You always use creative ways to explain the maths problems making them more understandable. Thank you!

[@grudgeswillbeheld2217]

If you put food in to Sal, Sal produces shit. Had to say it....

[@RvngePlays]

xD

[@charlesbaoumar]

Lol

[@charismaemmanuel2589]

Nice one 😂

[@chocolatedream0612]

This was absolutely. HILARIOUS. :D Good job Sal :)

[@TheElectrozoid]

If I had a dime for every pixel in this video... ...I'd have a dime

[@Kenneth-mj1hk]

lol

[@mjshaheed]

This video was made when you still in nappy pads...lol

[@hellheave]

LMAOOO

[@camille8563]

LMAOO

[@zfarahx]

f(dime)=dime

[@staydowntillucomeup8233]

No Sal I don't believe you lost anyone w/your Sal plus poison example.

[@ajuicejemas]

Sal, you've taught me more in this 9 and a half minutes than my teacher has taught me in pretty much the past 5 classes. Thank you so so much for making these.

[@kxn7759]

The place I go to when my math teacher tells us to write down notes but doesn't explain anything. AKA, everyday

[@natassciabryce2946]

Ikr. I just consider my math teacher as the session surpervisor cuz I'm sure he aint getting paid to do nothing.

[@slam2dunkz63]

me(ganja)=high....i think im now understanding functions and life in general is making more sense

[@brandon2932]

Remember: Study high, take tests high, get high grades.

[@slam2dunkz63]

i should start my own maths classes

[@tomasramilison]

+slam2dunkz63 I just smoked one, this comment is perfect.

[@tomasramilison]

+brandon2932 I disagree man, marijuana affects synapses in your brain and prevent efficient firing for certain neurons. Dont smoke before class and if you wanna be optimal for studying its also best to stay sober... Allthough I just smoked one and im reviewing functions so im not really one to talk...

[@slam2dunkz63]

Tomas Ramilison looool it makes both mathematical an logical sense. Good luck with your studies

[@tonga4lyfe1]

Bro thank you Sal, because of you i am not going to drop out of school, ur a blessing to youtube and the world

[@goldblade84]

I think the food example was great! I was able to listen to the example in the kitchen without thinking about the numbers and completely understand the concept of functions so when I saw the g(f(x)) example I did it in 2 seconds. Thanks, keep up the good work!

[@rainestar82]

I love these videos so much. I had no idea there was an even/odd rule for functions; my other curriculum never mentioned that! Thanks so much, Sal!

[@mumtaztalukdar]

hiii mr. khan For the past few day i was trying hard to understand the basic concept of ' what is a function?', and now after watching this video i am confidant enough to teach functions. Thank you so much...great job. jazak-allah-khair. جزاك اللهُ خير

[@PuncherUvFish]

Sal has been teaching students maths better for longer than I’ve been alive. You absolute champion

[@toddmfay]

You just summed up exactly how I felt about functions my entire algebraic life in the first 15 seconds of this video. I feel so much better already. You are so relatable (pun intended).

[@mariannekhansa5218]

My name is Marianne 😍 and that was really brilliant of you in comparing math to real life which gives us the reason why we are taking them.

[@deepigem]

Prep for a Cleo exam...learning math after 7 yrs...lakes my concept so clear...thank you...u r like god now..din knw math is so easy....thanks for chem and bio subjects too..l.

[@ZombiisRestWithVanny]

I could listen to you say "foood" all day. XD But truly thank youu, I get this now, you're the first person that I've listened to be able to teach a dyslexic.

[@zapatosluv]

Please don't apologize for the food example. I read a lot of different explanations trying to understand this. With that very first video and food example it just clicked! It was exactly what I needed to make sense of this. Thank you so much!

[@NathanGrubbs]

I'm a college student trying to go back and review some older, rusty math concepts. Your video was incredibly helpful and actually fun to follow. Thanks so much! I'll definitely be checking out other videos of yours.

[@liv4h]

Sal, beside explaining math in a simple way, you entertain me as well.. so I do both at the same time. Let me say.. thanks :) Keep up the good work. God bless ya.

[@88kal]

One of the best vids I've ever seen! Great job sal!

[@vitovitonii6473]

this is probably one of the funniest videos you've made yet. on the other hand, your video helped me quite a bit. thank you.

[@partygreens1]

awesome ... It proves that maths can be taught out of abstract world... It's a slap in the face of those teachers who just cram their maths books and vomit it out in the class room .. Thanks Salman !! You're the best..

[@kearlstig1961]

You are a good teacher, Sal. You made functions understandable to me.

[@Horrortelltales]

I've been learning from Sal so Much, i think im gay with his voice , is that weird?

[@MashrufKabir]

sometimes

[@ngotsekardeborah5560]

+SweDawgTv no cuz i love the voice too

[@phillipsegoapa7834]

+SweDawgTv yes

[@lavanya-wo5gj]

nope I love his voice too, it's so calming

[@larryphillips3107]

SweDawgTv gay asf

[@Darkelan]

I have a nice thick book from my university to explain functions. Eyes glazing over after 100 pages, yet this 9 minutes video explained so much more. Thank you Khan Academy for making it easier

[@imjustjoshying]

This is actually really awesome... I'm working on algebra in college. I'm pretty good with math but haven't grasped functions yet. I've been stuck on chapter 4 til really recently. After watching this video, it all makes sense! Thanks

[@businessfae]

So, I'm an undergraduate student and I have been watching your math videos to get me through Pre-calculus, and I just have to say that you are the most adorable thing ever! Your voice is just absolutely adorable and things you say make me want to pay attention. "I don't know your name, but I'd like to know your name." CUTE! Sorry, ha. By the way, I'm Kristina. Have a nice day and thank you for the videos.

[@jmerrick_]

wow your a genius! i like your sense of humor and how you made functions sound simple. THANKS!

[@SaarangAhujaAndDance]

Death LOL

[@TheElectrozoid]

hahahahaha

[@jesustv3862]

Khan, you are a gift to our generation.

[@jeevanrp]

hats off Sal!!! charming way of teaching... I am a teacher myself(not math), love ur style ! big fan!!!!!!! and Thank you for the videos.... Thanks a lot.

[@anitapansari1]

One of the funniest Khan Academy video's i have ever watched... Sal you are food.... :-)

[@ET3468]

geez!!! what a funny guy, makes me laugh heaps. Thanks, Sal! ima subscribe that help a lot.

[@ComputerScienceExplained]

This makes more sense if you end up taking "computer programming classes" down the road. Great explanation Sal!

[@KartingApexKing]

Jeez if only my teachers taught like this. Our heads were empty, yet they made the assumption it was full with the topic prior to teach us said topic. This is fun, enjoyable.

[@ElectricArms]

3:50 to 7:35 was hilarious. Good job.

[@koolkitty9876]

Oh my gosh, Sal, I've been watching your vids, and I'm learning a LOT, and I clicked this and I remember learning it in Algebra around 2 years ago...it was confusing, but I can't believe you used the BOX! :D

[@Killemquietly]

Thank you Salman Khan i've struggled with this. If you ever visit New Orleans, i'll buy you lunch! Keep up the good work!

[@joe1995lonely]

Sal, i have never encountered someone teaching in this way and I'm not saying that your teaching way is bad, but what i am saying is that it helped me remember the thing i need to learn and i did not understand it in class. Thanks

[@Pandoruu]

Algebra 1 has been challenging but this explained it perfectly

[@AwesomeJughead]

sal...you are AMAZING! u got me 2 understand functions in 10 minutes! and my teacher couldent do that in 2 weeks!!!!

[@shanny1610]

omg!!! i have a math exam on thursday and this video helped me a whole lot so far!!!!! thank you!!!

[@beerad21OX]

Sal, I think you did a great job. I never had functions in my live before. I heard of them, but never attempted them. I liked the example because it was an abstract way of thinking how functions produce other results. I liked how you didn't jump right into the numerical explanation. I think the first explanation helped me understand functions better. Thank you

[@MrKiromunist]

The sal(food) function may seem ridiculous, but in mainstream microeconomics (neoclassical), that's really what we do. The firm is a function, you put "stuff" into the firm and it produce things... like a firm(input) function :)

[@mariahphilmrazem]

wow i loved this. it clarified and you were hilarious. you remind me so much of my math genius friend who has the exact same sense of humor haha. keep making videos. you make a great teacher!

[@WorldCollections]

You are the best ! Keep them comming please !!!! Imagination is more important than intelligence !

[@martinmickels1478]

I learn more in one hour with Khan than I do in two weeks in school.

[@Shuey187]

Very nice intro Sal :). I am wanting to teach my son about functions, so your videos are going to be a great start!

[@Bravo57-57]

Sal, dude!!! i get it, finally you gotta keep posting these lessons,, youre the man!

[@nocturnalvisionmusic]

7:00 - 7:30 is the best part of this >:D

[@c.crystal8893]

Wow this 9 mins video alone has helped me understand so much more about functions compared to the one hour I’ve spent at school and I didn’t even understand anything in the end X’D

[@jmonstadu1549]

why do we need this in life ugh its so hard but thanks to you man i can get a lil idea of it

[@daedra40]

Sal (being sal) = too awesome. Thank you sal ; this video is simply godly.

[@FromTheNorthOfNorth]

There should be a possibility to reward Sal with money for all his hard (and extremely useful) work!

[@Eradifyerao]

THANK YOU SO MUCH - I have been SO stuck on these the concept BEHIND the functions....

[@st1220]

you(Sal(food): exists people named Sal: error

[@amandah611]

This video was hilarious good way to remember functions (; don't stop making videos and I'll try to provide food virtually (;

[@mattu1214]

I am not that good with math myself and I am going to learn about functions tomorrow. So thank you!

[@geico105]

This makes so much more sense after taking Programming classes. Math and Computer Science really do go hand and hand.

[@lucyloro]

You have just become my favorite person in the entire world :D

[@iRAJChauhan]

Hit like if you are watching this in 2017 !!!!!!!! This is 10 years old video, and I am still love it. Thank you Khan Academy. Lots of love from India.

[@MsTriara]

You're the best math teacher ever!!

[@halfmettal]

thanks a ton! next year i'll be taking my IGCSE exams and your videos are really helpful. I couldn't understand a thing my teacher tought me in class about functions. Thanks again!

[@lacqueredhearts]

Thank you so much for this Sal haha, it seriously helped me with some of my confusion with functions :)

[@akshaysoniboss]

hi this is akshay "sal" . u r just brilliant. i like your presentations very much

[@ninjajesus81]

Whenever I first found out about these videos, I thought it was an actual school where people attended and you only meant these videos to be for those people. I guess as a supplement to what they learned in your class. I don't know why I thought that, but I'm glad it's not the case, because I felt excluded and now I don't. Thanks for the videos.

[@Liveityall]

This guys is awesome! I'm so horrible at math, I'd rather learn the latin language! But he makes it easy to understand.

[@akmalhossain958]

Mr Khan is an absolute genius.

[@schopenhauer6251]

i literally searched for this lol. Sal is a legend

[@nocturnalvisionmusic]

I just did so to rewatch it again after a year (11/28/23) :D

[@vgremmels]

No, not confusing! That was exactly what I needed- words in place of numbers for an example.

[@bdub24j]

Couldn't agree with you more. I think it's the tone and unorthodox manner which helps me understand all this that much faster for some odd reason. But hey, it works.

[@ezshi87]

thx so much dude. im studying math for my DATs and i didnt do this math in 6 years. its a huge help!!!

[@phill3ttea]

Wow, this video is very old. I wasn't even born when this was uploaded! I feel old for some reason haha. This actually helped me, thank you.

[@amoxtlacatl]

Sal(information)=knowledge Sal(math+science)=the best math+science explanations ever

[@MAX-nv6yj]

Your explaining for this functions is amazing I just shocked bc of that amazing content, thank you from the midle of Jubail

[@hannahsealey2346]

Wow this helped A LOT..thanks😃

[@chrlttchpmn]

Best Khan video i have ever seen!

[@MaryumNoorX]

The sal, food and poison example is the reason I understand this topic now, thankyou!

[@Clawzek]

Thanks!!! Because of this, I don't have to worry about failing my Math Mid-terms!

[@aldreivohnaquino3100]

This was really helpful Sal, hope you will be reading this even with your busy schedule! Godbless and stay safe!

[@ASDFGHJKL140496]

this is serious teaching. the teachers in my school isnt teaching. they are just reading of something they memorised.

[@stevedziedzic1203]

Thanks Sal, at the very least I can now actually begin learning something. For whatever reason, too many math "professionals" start out at warp speed under the assumption you know what they're talking about. Your video was helpful!

[@hayatabdurhim3833]

This is amazing! Thank you so much Sal :D

[@LiamKanda]

A math video that's funny and helpful. That made functions a bit more easier to understand.

[@marisollq6745]

I actually feel like This is helping me because my Teacher is always jumping into conclusions and that's what makes me confused.So the work is shown for me the better Thanks🎈

[@lauraminton3000]

Thank god for Sal! I wouldn't have the grade I have in Math without him!

[@Vorbis5]

god sent this man to me. i am infinitely grateful.

[@_xhashx]

do you realize that this video is 10 years old!!!!!!

[@abhishekkulkarni7057]

holy crap yeah!

[@fishdishh4306]

Turbo Burrito do you realize that you might be 10 too

[@variousmentalproblems]

"I won't go into some of the things I would produce" Stay classy, Sal

[@brookereutinger5063]

Sal is my life goals.

[@swizzbeats1212]

Hahahahaha funniest video I've seen in a while, love your work and did like the touch of the fail humor :p

[@michaelknight1303]

Oh boy this is one of the earliest videos I’ve seen in a long time. Sal’s only got one color.

[@zeeiggy]

thankyou so much and if "sal, food and poison" is what u gotta do to get us to learn - carry on 'cus ur doing a great job ;)

[@mudasirzafar5936]

sick video bro , math getting really cool now:)

[@oliviaaa2324]

sals so cute "Lets say you're a function, I don't know your name, I would like to, but I don't, your name" hahhaaha

[@bwood6337]

I realize this video is really old but I still wanted to say that this is really well made and helpful.

[@Rensyl]

your videos are really helpful thank you. It could be better with better quality but it's ok anyways. Greetings from argentina.