Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 4 - 4.3 - Conics - 4.3 Exercises - Page 337: 15


Focus: $(0,\frac{1}{2})$ Directrix: $y=-\frac{1}{2}$

Work Step by Step

Parabola in the standard form with the vertex at origin (vertical axis): $x^2=4py$ $y=\frac{1}{2}x^2$ $x^2=2y$ That is: $4py=2y$ $p=\frac{1}{2}$ $(0,p)=(0,\frac{1}{2})$ Directrix: $y=-p=-\frac{1}{2}$
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