Is the function below exponential?

Question

q(r)=−8/3^r
If so, write the function in the form q(r)=ab^r and enter the values you find for a and b in the indicated blanks below. If the function is not exponential, enter NONE in both blanks below.

a=-8
b=??

Answer 1

I assume you mean

 

q(r) = -8 / 3^r = -8 (1/3)^r

 

a = -8

b = 1/3

 

It is exponential.