Answer
A quantity, when experiencing exponential growth, increases exponentially as the growth is non linear and thus the values change drastically.
Work Step by Step
For example, in the case of y=$3^{x}$:
When x=2
y=$3^{2}$ = 9
When x=3
y=$3^{3}$ = 27
When x=4
y=$3^{4}$= 81
This shows that the values are increasing drastically and experiencing exponential growth.