College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 7 - Section 7.2 - The Parabola - 7.2 Assess Your Understanding - Page 514: 16



Work Step by Step

Axis of symmetry is parallel to the y-axis, opens down. According to Table 2, Equation: $\quad (x-h)^{2}=-4a(y-k)\quad $ With $\quad (h,k)=(0,0)$, we look for $\quad x^{2}=-4ay$ ... choice $D.$ Testing the point$\quad $ ($-2,-1):$ $(-2)^{2}=-4(-1)\quad $... yes.
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