College Algebra (11th Edition)

by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie

Published by Pearson

ISBN 10: 0321671791

ISBN 13: 978-0-32167-179-0

Chapter 3 - Section 3.1 - Quadratic Functions and Models - 3.1 Exercises - Page 294: 31

Answer

Graph $E$

Work Step by Step

$a<0$ means the parabola opens downward. $b^2-4ac$ (that is discriminant) equals $0$ means parabola touches $x$-axis (there is one solution). Such graph is graph $E$.

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