Question

Choose all the key words that indicate an exponential function.

A
decreases by a factor 0f .12
B
quadruples
C
increase by 100
D
decreases by 2
E
increase by a factor of 10
F
increases by 23%

Answer 1

Answer: A, E and F.

Explanation:

A simple exponential function is something of the form

f(x) = a*r^x

a is the initial amount

r is the factor of increase of decrease.

x is the variable.

then any increase or decrease by a given factor can be related to a exponential function so options A and E can be related to exponential functions.

Particularly, the option F says that the increase is by 23%.

So we have that the increase is:

A to A + 0.23*A = 1.23*A

So we have a factor of 1.23, this is also an exponential function.