Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Appendix A - Section A.1 - Introduction to Functions - A.1 Problem Set - Page 487: 28

Answer

Refer to Graph I Domain is all real numbers of $x$ Range is {$y$ | $y \ge 2$} The graph is a graph of function

Work Step by Step

Refer to Graph I for the graph of $y$ = $|x|$ + 2 (in black color). The domain is all real numbers of $x$, and the range is {$y$ | $y \ge 2$}. By means of vertical line test (in red color), the graph is a graph of function since at any x-value, the line cuts the graph at no more than one y-value.
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