Answer
Graph $B$
Work Step by Step
$a>0$ means the parabola opens upward.
$b^2-4ac$ (that is discriminant) equals $0$ means parabola touches $x$-axis (there is one solution).
Such a graph is graph $B$.
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: 36
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