Answer
vertex: $(0,0)$
Focus: $(0,-\frac{2}{3})$
Directrix: $y=\frac{2}{3}$
Work Step by Step
$3x^2+8y=0$
or, $x^2=4(\frac{-2}{3})y$
Thus,
vertex: $(0,0)$
Focus: $(0,-\frac{2}{3})$
Directrix: $y=\frac{2}{3}$
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Chapter 10 - Parametric Equations and Polar Coordinates - 10.5 Conic Sections - 10.5 Exercises - Page 720: 4
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