College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 3 - Section 3.2 - The Graph of a Function - 3.2 Assess Your Understanding: 5

Answer

$a=-2$

Work Step by Step

We need to find $a$ so that (-1,2) is on the graph of: $f(x)=ax^{2}+4$ We plug in the point: $f(-1)=a(-1)^{2}+4$ $f(-1)=a+4$ $2=a+4$ $a=2-4$ $a=-2$
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