Which of these functions has a larger base? Function 1 is represented by the following equation: f(x)=2^x

Function 2 is represented by the following points: (1,4),(2,16),(3,64),(4,256),(5,1024 )

Hint: in the function 2^x, the base is 2

A. Function 1 has the largest base
B. Function 2 has the largest base
C. The functions have the same base
D. It is impossible to compare the base of the two functions