Answer
See the picture below.
Work Step by Step
By calculating a few pairs and connecting the dots on the graph with a smooth curve, we graph the function.
A few pairs:
$f(-1)=\frac{1}{3}^{-1}=3$
$f(0)=\frac{1}{3}^0=1$
$f(1)=\frac{1}{3}^1=\frac{1}{3}\approx 0.33$
$f(2)=\frac{1}{3}^2=\frac{1}{9}\approx 0.11$