Answer:
Option B = -9%
Step-by-step explanation:
Given : Given an exponential function for compounding interest,
To find : What is the rate of change?
Solution :
The general form of the exponential function is
Where,
r is the rate of change
if r> 1 then it is growth rate
if r< 1 then it is decay rate.
Comparing given function with exponential function,
It is a decay rate.
Convert into percentage, multiply with 100
Therefore, Option B is correct.
The rate of change is -9%.