Answer
See graph.
Work Step by Step
Step 1. We can identify the domain and range as: Domain $x\in[-4,4]$, Range $y\in[-4,0]$
Step 2. The equation can be rewritten as
$y^2=16-4x^2$ or $\frac{x^2}{4}+\frac{y^2}{16}=1$
Step 3. We can graph the semiellipse as shown in the figure.
