Hi I have a question and I keep getting it wrong. Could someone help me as soon as possible ?

Question

Question 1: Determine whether f is an exponential function of x. If so, find the constant ratio.

 

A.) f is not an exponential function.

B.) f is an exponential function with a second difference of 5.

C.) f is an exponential function with a constant ratio of 3.

D.) f is an exponential function with a second difference of 3.

 

Answer 1

3 = ab^-1

8 = ab⁰

8/3 = b¹

16 = ab¹

27 = ab²

27/16 = b

8/3 = 27/16 ??

What does that sasy about it being exponential?