# Which is an exponential function f(x)=x^3 or g(x)=3^x?

$g \left(x\right) = {3}^{x}$
Exponential functions come in the form $f \left(x\right) = {b}^{x}$.
A power function comes in the form $f \left(x\right) = {x}^{r}$.
Thus, $g \left(x\right) = {3}^{x}$ is an exponential function.