Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 7 - Functions and Graphs - 7.2 Domain and Range - 7.2 Exercise Set - Page 458: 28


Domain = $\mathbb{R}$ Range = $\{y\ |\ y \leq 4\}$, or $(-\infty,4]$

Work Step by Step

If the function is described by a graph, then the domain is the set of all first coordinates of the points on the graph. The range is the set of all second coordinates. The first coordinate of a point of the graph can be any real number. Domain = $\mathbb{R}$ The second coordinates are real numbers, $4$ or under $4.$ Range = $\{y\ |\ y \leq 4\}$, or $(-\infty,4]$
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