Answer
ellipse.
Work Step by Step
This equation contains both positive $x^2$ and $y^2$ terms with different coefficients. Using coefficients, we have $A=1, C=9, AC=9\gt 0$; thus it is an ellipse.
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 9 - Test - Page 1037: 11
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