Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 13 - Section 13.1 - The Parabola and the Circle - Vocabulary and Readiness Check - Page 924: 8


The parabola opens downwards.

Work Step by Step

The standard form of a parabola is: $ax^2+bx+c$, and whenever the coefficient of a is a positive number, it opens upwards, if it is negative, then it opens downwards. The given equation is $y=-x^2+16$ and because the coefficient of a is -1, it opens downwards.
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