Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 9 - Section 9.3 - The Parabola - Exercise Set - Page 999: 99

Answer

$(x+1)^2=-8(y-2)$

Work Step by Step

Step 1. The directrix is horizontal and 4-units above the focus, indicating that the parabola opens downward. Step 2. We have $2p=0-4$, $p=-2$, and the vertex is at $(-1, 2)$. Thus the equation is $(x+1)^2=-8(y-2)$
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