Answer
4
Work Step by Step
When a graph is symmetric with respect to the y axis, a point (-x,y) will have a corresponding point (x,y).
Thus, if $-4$ is an x-intercept of the graph, then $4$ is also an x-intercept.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 1 - Graphs - 1.2 Graphs of Equations in Two Variables; Intercepts; Symmetry - 1.2 Assess Your Understanding - Page 16: 6
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