Answer
Circle
Work Step by Step
$x^{2}$ and $y^{2}$ are both proportionally scaled the same by 9 and are added together with the same sign on the same side. Therefore it must be a circle.
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 10 - Conics, Parametric Equations, and Polar Coordinates - 10.1 Exercises - Page 693: 55
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