Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Section 11.6 - Further Graphing of Quadratic Functions - Vocabulary and Readiness Check - Page 819: 4

Answer

2 x-intercepts, 1 y-intercept

Work Step by Step

We are told the parabola opens up and has its vertex in quadrant III. With the vertex in quadrant III, we know either the x value of the vertex is less than zero or the y value of the vertex is less than zero (or both are true). Since at least one coordinate of the vertex is negative, and the parabola opens up, the graph of the parabola does cross the x-axis. Since the graph does cross the x-axis, there are two x-intercepts. Since at least one coordinate of the vertex is negative, and the parabola opens up, the graph of the parabola does cross the y-axis. Since the graph does cross the y-axis, there is one y-intercept.
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