Answer
$x^2+y^2=9$
See graph.
Work Step by Step
Step 1. Using $r^2=x^2+y^2$, we have $x^2+y^2=3^2$ or $x^2+y^2=9$
Step 2. We can identify the above equation as a circle with center $(0,0)$ and radius $r=3$
Step 3. See graph.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 6 - Review Exercises - Page 798: 40
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