Exponential and logistic growth in populations | High school biology | Khan Academy

[@ati3armyofrobots]

When the food resources&space are unlimited, exponential growth is possible which is J shape. It is limited in a certain amount ,so it's logistic growth, which is S shape

[@SherwoodRobyn]

This was really helpful to supplement my degree course, you explained it really simply :) thank you

[@keithwatkins6465]

👐🏾🌐👐🏾infinite space, and a near infinite number of stars; eternal seasons of growth are possible in a green cottage industry post scarcity space civilization 👐🏾🌐👐🏾

[@justjulied]

came here for the pic

[@fzhs7030]

Lol me too it's cute

[@khushalsinghrajput4776]

😂

[@berchmansjoseph]

Same hahahaha🤣

[@OwenChiu]

your cute

[@OwenChiu]

Thanks so much, I want to eat bunnies now

[@rubondoislandproject]

This is great but, in my data I don't know the intrinsic rate of increase (r), can you show me how to do an exponential model using life history data?

[@my_balls_sway_in_the_wind]

after 4 years nobody helped you.........

[@artemischen4086]

@@my_balls_sway_in_the_wind 5 years later still no one help lol

[@my_balls_sway_in_the_wind]

@@artemischen4086 LMAO

[@du42bz]

@@my_balls_sway_in_the_wind They couldve used Google, it's a simple problem

[@lightray9264]

7 years

[@nobodyhere8057]

Didn't understand anythink lol🎉

[@Hgh38]

Cute bunnies

[@spurti]

Why 0.1(1%)+1???

[@Luckyboy-bj5pq]

I like your vid

[@user-fk9ic6td8n]

This all great really appreciate the video but could we get rid of the rabbits their cuteness is distracting me from the math.

[@enyejii]

Khan Academy your the best presenter

[@vaishuvaishu5743]

くさんありますありがとうございます」、

[@sciencenerd7639]

Great video, thanks

[@salmashaker3458]

I love you.

[@khushalsinghrajput4776]

😂😂

[@gemmaholman6416]

Hi Salman, I'm just looking for a video that explains intrinsic rate of increase and wondered if there were any on your channel? I couldn't seem to find any and need some help, please.

[@kreme561]

i'm confused on the percentage, isn't it supposed to be .1 since 10% is actually .1?

[@umati_rasool6198]

@Randall W ,, can u give me ans plzz I ask u a question the question is in environment science ,, (what is exponential growth? Discuss it's characteristic,s. Plz reply me answer my question I will need for examination.

[@Codekari]

well it grows so would not be less than the first population so it means it is 110 %

[@tesa2482]

to find growth factor you need to take 1 plus the percentage it grows by. in this case the percentage was 10%. 10% equals to 0,10. because it grows by 10% you have to take 1 + 0,10 and that equals to 1,1 if the factor were to decrease every year, you would have to subtract the percentage. for example if it decreased with 10% every year. you would take 1- 0,10 which equals to 0,90.

[@ayeshasaddiqa6218]

why did we multiply it with 1.1 for an increase of 10% in population?

[@samsam6113]

He did it more complicated So let me explain . You turn 10% into 0.10 and multiply it by 1000. So since it’s increasing your going to add your result to the first number. Work out: 10% = 0.10 0.10* 1000= 100 100 +1000 = 1100. Answer =1100 So in the end we have the same answer

[@k._875ly5]

Would the table that he did, have the same out come as the equation: Population[time+1]=Population[time]+GrowthRate•(-1 population[time+1]/CarryingCapacity)•Population [time] ?

[@kidstimewithauntyanne9373]

im confused. please help!!!! it makes sense when using 10%. but the moment i try to use 3% or 5% or any other i get lost. please help

[@kraftyswagger3693]

1.03?

[@oliviabree3121]

Sorry I know this is late but I’ll respond for people wondering the same thing. When doing INCREASING by 3% it would be 1.03 when DECREASING it would be 0.97. If you think about it, multiply something by anything less then 1 will make its decrease. So it wouldn’t make sense to be increasing by 3% but have 0.97 because that would make it decrease. This you have to do 1 PLUS whatever percent. The 1 will make it increase. When decrease in so 1 - percent to make it decrease! If the percent is increasing by 500% it would be 1 + 5. If it’s increasing by 3% it would be 1 + 0.03. If it’s decreasing by 76% it would be 1 - 0.76 = 0.24. Hope this can help

[@spurti]

How 1.1???

[@abrahakahsay]

Hi Sphoorti, this may be late but let me explain in case someone needs it. when using percents we may say 100 percent or 1(varies from 0 to 1) to indicate the total amount. so, initially, we have 1000 which is 100 percent or 1; after 1 month, the population grows by 10% or 0.1 which means that 10 percent of 1000 is 100. so we can say the population after one month is 110% or 1.1 of the total population. Mathematically, (110x1000)/100=1100 or 1.1x1000=1100. I hope it helps.

[@spurti]

@@abrahakahsay thanks for explanation

[@OwenChiu]

@@abrahakahsay Thanks for the explanation, really stepping it up and being a role model

[@abrahakahsay]

@@OwenChiu Glad it helped. Thanks for your inspiring words.

[@i1-L22Belarus]

This video is being used as curriculum in the Arizona State University online class BIO182. I'm curious if this is considered an appropriate use of the content. Are you being paid for your lecture content by ASU?

[@anonymousgirl6726]

It is hard to understand.. give definition

[@ghostroaster55]

First

[@OwenChiu]

but did I ask?

[@zaimahbegum-diamond1660]

where did he get 120 from?

[@zaridarien8776]

He just had it as an example, the 120 was supposed to demonstrate how the formula can calculate any number plugged in for the n

[@ftvideos7663]

1 year is 12 months , so 10 year is obviously 10*12 = 120

[@khushalsinghrajput4776]

😊