Answer
$x^2=28y$
Work Step by Step
If the parabola has its vertex at $(0,0)$ and its directrix at $y=-p$ then the equation is: $x^2=4py$.
Hence here $p=-7$, thus the equation is: $x^2=28y$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 9 Quadratic Relations and Conic Sections - 9.2 Graph and Write Equations of Parabolas - 9.2 Exercises - Skill Practice - Page 624: 40
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