Answer
The given circle has:
center at (0, 0)
radius $=\sqrt5 \approx 2.236$ units
Refer to attached image for the graph.
Work Step by Step
RECALL:
The standard equation of a circle whose center is at (0, 0) and radius $r$ is:
$x^2+y^2=r^2$
The given equation is similar to the standard form given above.
Thus, the given equation represents a circle with center at (0, 0) and
$r^2=5
\\r=\sqrt5 \approx 2.236$
Therefore, the given circle has:
center at (0, 0)
radius = $\sqrt5 \approx 2.236$ units
Plot the points $(-\sqrt5, 0), (\sqrt5, 0), (0, -\sqrt5), \text{ and } (0, \sqrt5)$ then connect them using a curve to form a circle.
Or, use a graphing calculator to have the graph attached in the answer part above.