#### Answer

Refer to the graph below.

#### Work Step by Step

RECALL:
The graph of the equation $x^2+y^2=r^2$ is a circle with center at $(0, 0)$ and a radius of $r$ units.
The given equation can be written as $x^2+y^2=4^2$.
Thus, the graph of this equation is a circle with center at $(0, 0)$ and a radius of $4$ units.
To graph the circle, perform the following steps:
(1) Plot the center $(0, 0)$.
(2) Plot the four points 4 units directly above, below, to the left, and to the right of the center.
(3) Connect the four points (excluding the center itself) using a curve to form a circle.
(Refer to the graph in the answer part above.)