Answer
vertex: $(0,0)$
Focus: $(-\frac{1}{2},0)$
Directrix: $x=\frac{1}{2}$
Work Step by Step
$2x=-y^2$
or, $y^2=4(\frac{-1}{2})x$
Thus,
vertex: $(0,0)$
Focus: $(-\frac{1}{2},0)$
Directrix: $x=\frac{1}{2}$
Multivariable Calculus, 7th Edition
by Stewart, James
Published by
Brooks Cole
ISBN 10:
0-53849-787-4
ISBN 13:
978-0-53849-787-9
Chapter 10 - Parametric Equations and Polar Coordinates - 10.5 Exercises - Page 700: 3
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