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

Question

a) f(x) = 0.4 (0.2) ^x
b) f(x) = 4(0.98)^x
c) f(x) = 0.7(5)^x
d) f(x) = 5(4) ^-x

I think it is c, can you please help?

Answer 1

@ms.sue @reiny