Functions (Part III)

[@dipro001]

Its quite funny how this guy without even seeing knowing or talking to others can explain so much to so many in a few minutes which math teachers around the planet couldn't do to them through their whole school life! Thanks man, this really helped :)

[@bigquestionmark311]

You can look at a function as sort of a machine. It takes the input, does something to it, and spits out an output. For example, if a function f(x) = 3x + 4, then the function f(x) takes the input, multiplies it by three, and adds 4. what f(x) means is the input "x" is being put through the function "f." The reason it is f(x) instead of f(y) is because we are doing things to x, not y.

[@leisybeats1883]

And here goes me in 2022 at the fist lesson I thought of function as a Wendy machine you insert $5 the machine scan the coin(Acting in place of the eqaution) then you get dependent viarable which is $5 items thanks man.

[@RobFayette]

I love Sals sense of humor. It makes his videos even better. Thanks so much for what you are doing for all of us Sal

[@mirrorsandpotatoes]

Mr. Sal, da realest mvp

[@MgIsDanger]

Thumbs Up! If He Made You Understand So Well The First Time ... That Every Time He Gave A New Problem You Paused And Solved It Before Seeing What He Says! Your Awesome Sal!

[@AnabelleDewi]

thank you so much sal, i dont even know what to do without your videos

[@bmon9682]

+soron prfbs amen!

[@QuickBeat]

😊👍

[@tiddybank]

This guy has gotten me through AP world, Pre-cal, and Chem. Best tutor ever.

[@wowxaneeesh]

Sal is one of the finest mathematician I've ever seen. His explanation makes me feel to learn more and more (y) Here is a JEE Aspirant :) Thanks a lot!

[@randomhighestratedmovies3356]

Aneesh Kumar did u clear it?

[@christinewalker5873]

this was posted when I was only 4 years old.but here I am 18 years old,still understanding everything.Thanks Sal

[@user-vb2gv3dc5r]

Uss Time Tou Internet bhi bhaut Slow Tha As compared to Now

[@Infinity-hm7kr]

you saved my math exam o.o .. i understood nothing at school but thanks to you i actually understood this :)

[@MichaelPeterHamilton]

Khan Academy and all their associates are now my friends. They make the world a better place, and for that they are worthy of my friendship lol. Seriously though.

[@TwistedPencils]

KhanAcademy--Has fours 9-minute videos about FUNCTIONS which roughly rounds up to 37-38 minutes. Still teachers more than three 1-hour sessions of Math class.

[@aidenszeto7223]

Wow, very true

[@rockconnaisseur]

You have an amazing gift for teaching Sal. Thank you for spending the time to make these videos.

[@srinivasraman50]

Thanks a lot Mr.Sal, this is very useful for my IIT-JEE preparation and i can understand the core concepts damn clearly

[@5mOk3W3ED]

learning functions while taking a dump! Thanks, Sal Kanh! you the best

[@faraz1729]

Thanks so much Sal. I've really learnt a lot from your videos and I'm sure hundreds of people can say the same. I hope you continue to make some more great videos.

[@bob8984]

Why go to school for math? I have ADD and every time my mind drifts off in class I fall behind and have trouble catching up. But with these videos I can pause and go back. Really, all I need is a math book and this guy to learn math.

[@Eifia1337]

im learnin more with sal in 1 day that what i learnt with my professor in my first college year. Awesome.

[@disney6858]

my teachers dont teach my class anything sal. youre a great guy and i love your videos... keep aking them..............PLEASE!!!!!!!!!

[@MrHeartBreakKid619]

you have helped a lot of people. Thank you!

[@shanebehemoth]

this man deserves the nobel prize..he prevented me from murder...

[@NUGGet-3562]

I normally understand mostly everything in math and I love it, but now I'm studying for my ACT and I'm realizing there are a couple things on there that I never learned for some reason (such as matrices) or DID learn but didn't understand (such as functions). Your videos are preparing me for this and I'm very thankful for your help.

[@MrYou2berz]

you're the best teacher in the world

[@elementoxygen]

Ya, Sal always does a good job in his videos

[@WorldCollections]

Very, very helpfull. I liked very much that it started with the graphed function !

[@circlesarecrazy]

Thanks, Sal. You're the man!

[@ajuicejemas]

You, sir, are a godsend.

[@estacholi]

I have a test coming up this wkend n i had forgotten this stuff, this was very helpful... Will watch ur 4th video. Thank you!!

[@onionpie310]

Yadira Diaz I wonder where you’re at now

[@dingdong3021]

Learning computer programming helped me a lot

[@denverdude80]

I would really like to know where this "Sal" teaches. This helped out so much with learning my functions I would love to either take his classes, or if they are available, to watch his full video collection.

[@user-vb2gv3dc5r]

Don't know

[@meganmendiola6973]

god bless you.

[@brigidflynn1507]

you are the best I'm going to recommend you to all my friends

[@ardanmason9681]

Thank you, your videos helps me study for my exam .

[@NimsieWimsie]

How is it that when you go through functions I understand it but when my maths teacher does 3 lessons on this topic I can't grasp a single thing? You're good, thank you!

[@bolmung]

Do you have a teaching degree or are you just naturally this great? xD

[@BuhlenKwenzo]

yeah you guys are the realest, thumbs up from me... your work is highly appreciated

[@MrUncooldude]

I liked this. Thumbs up if you liked this.

[@Pouvoir4k]

Nic video but can you tell me the equation of this graph

[@Valeriawiwawawawawaw]

Do you have any videos explaining the peacewise and step function graph ????

[@TIJOLPETER]

video was great!what is this blackboard software you are using?

[@AKN0111]

Thanks Sal but I never found a video that can help me. My issue is that I know how to make a graph if I'm given an absolute, linear, quadratic, reciprocal, or square root equation but what I don't know is how to make an equation when I'm given an absolute,linear, quadratic, reciprocal, or square root graph

[@disney6858]

you make the internet what it should be, access to other peoples knowledge.

[@enteng2366]

thank you for sharing your knowledge

[@jamesgumbi6394]

thanks Mr Khan.......stay blessed

[@lauren96ish]

thanks sal!

[@houseofellie]

you are amazing! thank you so much!!!!

[@LOLMAN22]

man sal kicks so much ass, I learned functions in 3 days :-D the free math module on the site really helps too :D what grade do they teach this at?

[@GHJBDF159]

I don't understand the graph can you explain it please?

[@duke2782]

cool video , i enjoyed it

[@LopanaSaga16]

THANK YOU THANK YOU THANK YOU!!!!!

[@rahuldude98]

Sal is the best

[@LiveGoodPhilippines888]

thank you so much sir.

[@karamarachid1886]

Thank you so much

[@elementoxygen]

Ya, what is g by meaning and why do people use it?

[@palmagil6]

i loveee you!

[@zahidurrahaman7229]

On what logic did you draw the graph??.I couldn't understand....... :-(

[@estherhozy9475]

U r the best

[@mikeyy2611]

100% agreed

[@italkuenjoy]

Damn after watching this vid, i can honestly say........ If my math class was a KARATE class, i would be the KARATE KID

[@EXHellfire]

lol when you said that we should try doing it before you i noticed i paused the video and did every exercise and then checked i was right with your own answer

[@butterflypinky12345]

useful video

[@OPNURISYDER]

I'm the last person on Earth that should try and answer your question. I see it like this: f(x)= -1 plus the opposite of f(x)= -1 would be f(1) so, f(-1) - f(1) = 0. Does that make any sense?

[@BattlefieldSkits]

yeh he did

[@HaiderRehman7]

Will anyone please tell me that why we take f(x) instead of y?please somebody explain it

[@hailemariamgebreegziabhera9318]

you can do y too there's no difference it's just more common with x

[@MgIsDanger]

Yeah sort of! thnx

[@megaelliott]

it is just a second function

[@shiroimori]

0:50 cringe part

[@TheElectrozoid]

How?

[@tremaunmorrison5627]

ikr

[@clementchiu6620]

1:08 did he just sing?

[@sock1953]

i love u sal

[@annaoi_art]

@TIJOLPETER looks like paint.. but i could be wrong

[@MgIsDanger]

wouldn't [f(-1)]-f(-1) be 1+1= 2?? Just Askin'

[@paulceltics]

Yes I KHAN!!

[@hammurambi]

anywhere from 8th frade to 10th grade

[@abrahamjideofor7406]

lovely (y)

[@trewadventures7034]

doesn't f(-2)2) = -4 not plus 4 ??

[@traciemorgan3426]

-2^2 = 4

[@anandissac3582]

f[(-2)^2] right becuase you're substituting the x value. You're probably just mistaking it as f(-(2^2))

[@fluffything7134]

if a number is squared , it always results in a positive.

[@nor4eto999]

what no

[@jelzap]

@AcutePorphyria really? No way

[@TheBhai420]

there is one fault on y line

[@Ghost-Studios-Channel]

than q okkaj

[@GardenStateDigital]

niceeeeeeeeeeeeee

[@violinov]

:D:D:D:D

[@sweetmissingwing]

can we see your face :))

[@mudasirzafar5936]

math not an issue any more

[@WomiTrockiT]

2:34 HE CAN'T EVEN WRITE A W!!! xD

[@Kphay2]

he is.