Answer
point.
Work Step by Step
The equation is of the standard form of a circle with $r=0$, thus it is a point.
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 10 - Analytic Geometry - Test - Page 1004: 18
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