College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 7 - Conic Sections - Concept and Vocabulary Check - Page 698: 2

Answer

a)

Work Step by Step

We can see that two values of $y$ belong to a value of $x$, which is only possible in case a), so that is the answer.
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