Question

Which of the following functions shown in the table below could be an exponential function? Check all that apply.

x -3 -2 -1 0 1 2 3
f(x) 0.37 1.11 0.82 2 3.65 5.15 8.45
g(x) 0.008 0.04 0.2 1 5 25 125
h(x) 1.25 1.5 1.75 2 2.25 2.5 2.75
k(x) 64 16 4 1 0.25 0.0625 0.0156

A. f(x)
B. g(x)
C. h(x)
D. k(x)