Which of the following options results in a graph that shows exponential growth

A.f(x)= 0.4(3)^x
B.f(x)= 3(0.5)^x
C.f(x)= 0.8(0.9)^x
D.f(x)= 0.9(5)^-x

2 answers

A is the only one that has a positive base > 1
so A
Thank You
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