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SAT Math: Recognizing the Correct Exponential Graph to Express Cell Reproduction 1 Views


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Description:

Cells double in number every few hours. Which of the following graphs models the number of cells as a function of time?


Transcript

00:00

Yeah Whoa Okay Say T match members A short question

00:06

foryou Cells double in number every few hours Which of

00:09

the following graph models the number of cells as a

00:13

function of time Okay so if they double and they

00:18

keep doubling your expecting like a huge fast f sixteen

00:23

flight upwards like straight up So it just looking at

00:25

a let doesn't make any sense I would mean like

00:28

they're the same amount No matter how much time like

00:30

time is long this XX is here meaning that they

00:33

just grow the same with time and be well that

00:36

just is a kind of flat There's nothing geometric going

00:39

on it What about the doubling thing And see Says

00:41

they just grow infinitely fast and well here's the that

00:44

looks about like the way in F sixteen takes off

00:47

Right So we gotta hand it to him Cells reproduce

00:49

quickly in order to keep the body going Since sells

00:51

consistently double in number while they form an exponential function

00:56

Don't believe us counted out One two four eight sixteen

00:59

thirty two sixty four Yeah Here's another way to express

01:01

that pattern It's two to zero to the one to

01:04

do the three and so on So we've been through

01:06

the others They're all straight lines It doesn't mean anything

01:08

if it can't reflect the geometric compounding here that defines

01:12

a curve Well good work sells You guys keep reproducing

01:15

and we'll keep solving math problems So yeah the answer 00:01:17.9 --> [endTime] is D right here That's a airplane taking off

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