Answer
$x^2=20y$
Work Step by Step
It is a parabola with vertical axis. Directrix: $y=-p$
Directrix: $y=-p=-5$
$p=5$
Equation: $x^2=4py$
$x^2=4(5)y$
$x^2=20y$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 7, Conic Sections - Section 7.1 - Parabolas - 7.1 Exercises - Page 555: 42
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