The table of values represents an exponential function ​f(x). What is the average rate of change over the interval −1≤x≤3?

Enter your answer, as a decimal rounded to the nearest hundredth, in the box.

$\text{Basic}$
$x$$y$$x^2$$\sqrt{ }$$\frac{x}{ }$
$x\frac{ }{ }$
$x^{ }$$x_{ }$$\degree$$\left(\right)$$\abs{ }$$\pi$$\infty$
x f(x)
−1 13
0 1
1 3
2 9
3 27
4 81
5 243