Consider the exponential function f(x) = 1/5(15x). what is the value of the growth factor of the function?

a.1/5
b.1/3
c.5
d.15

Option: d is the correct answer.

      d.   15

We are given a exponential function as:

We know that in general a exponential function is represented by:

where a is the initial amount and b represents a growth factor if it is strictly greater than 1 and a decay factor if 0<b<1

Hence, the value of the growth factor of the function is:

                              d.   15

i assume that by 5 you mean 5 gallons.

(20)(0.25) = 15

removing 15 gallons reduces the tank from 20 to 5.