College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 6 - Section 6.1 - Parabolas - 6.1 Exercises - Page 590: 21

Answer

Vertex =$(0,0)$; Focus $=(0,6)$; Directrix $y=-6$; Axis of symmetry $x=0$

Work Step by Step

We are given that $x^2=24y$ This equation has the form as $x^2 =4py$ wherein $4p=24 \implies p=6$. Here, the vertex is $(0,0)$ and the axis of symmetry is the $y$-axis, that is, $x=0$ and the $x$-term is squared which shows that the parabola is vertical with focus $(0,p)=(0,6)$. Now, the directrix is $y=-p=-6$ Our results are: Vertex =$(0,0)$; Focus $=(0,6)$; Directrix $y=-6$; Axis of symmetry $x=0$
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