Calculus 8th Edition

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

Answer

vertex: $(0,0)$ Focus: $(0,-\frac{2}{3})$ Directrix: $y=\frac{2}{3}$
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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: $y=\frac{2}{3}$
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