If the data below is from an exponential function, what is the value of a?

Question

X- 3   5   7

Y- 8   a   18

 

A) 12

B) 12.5

C) 13

D) 13.5 

Answer 1

A) 12 is the value of a

 

for an exponential function the percentage change in intervals of equal length is constant.

 

8->12 increase by 50%

12->18 increase by 50%