Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 3 - Polynomial and Rational Functions - 3.1 Quadratic Functions and Models - 3.1 Execises - Page 312: 10

Answer

$B$

Work Step by Step

RECALL: (1) The vertex form of a quadratic function is $f(x)=a(x-h)^2+k$ where $(h, k)$ are the coordinates of its vertex. (2) The graph of the quadratic function $f(x) = a(x-h)^2+k$ opens (a) upward when $a \gt 0$, (b) downward when $a \lt0$. The equation $y=-(x+2)^2+2$ can be written as $y=-[x-(-2)]^2+2$. With $a=-1$, then the graph of the function is a parabola that opens downward. This equation is in vertex form with its vertex at $(-2, 4)$. Therefore, the answer is Option B.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.