Answer: The multiplicative rate of change of the function is 0.5.
Explanation :-
The exponential function is given by
, b is the rate of change and x is the time period.
It can be seen that it is a GP, therefore

From the given table we can see at x=1 , y=0.25
At x=2 ,y=0.125
The multiplicative rate of change of the function

At x=3 ,y=0.0625
The multiplicative rate of change of the function

Thus multiplicative rate of change of the exponential function is 0.5 .