Answer
$y^2=8x$
Work Step by Step
Directrix: $x=-2$
In a parabola with horizontal axis:
Directrix: $x=-p$
So, $p=2$
Equation of a parabola with horizontal axis: $y^2=4px$
$y^2=4(2)x$
$y^2=8x$
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: 50
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