Question

Which is an exponential growth function?

Answer 1

It should be B i think, but not exactly sure.

Answer 2

Answer:

Option 2 -  $f(x)=0.25(5.25)^x$

Step-by-step explanation:

To find : Which is an exponential growth function?

Solution :

Exponential growth function is defined as $y=ab^x$

Where b=1+r is the growth rate function or b>1.

Now we compare all the given functions,

1) $f(x)=6(0.25)^x$

Here, b<1 so it a exponential decay function.

2) $f(x)=0.25(5.25)^x$

Here, b>1 so it a exponential growth function.

3) $f(x)=-4.25x$

It is a linear function.

4) $f(x)=(-1.25)^x$

Here, b<1 so it a exponential decay function.

Therefore, Option 2 is correct.