Answer:
D
Step-by-step explanation:
Exponential equation takes the form [tex]y=ab^x[/tex] where
a is the initial value ( a ≠ 0), and
b is the base ( b ≠ 1)
The equation given can be written as [tex]y=3.1^x\\y=1*3.1^x[/tex]. Thus, it is an exponential equation.
So a = 1 and b = 3.1
Thus we can say that the initial value = 1 and the base is 3.3
