## Intermediate Algebra for College Students (7th Edition)

Published by Pearson

# Chapter 1 - Section 1.1 - Algebraic Expressions, Real Numbers, and Interval Notation - Exercise Set - Page 13: 78

#### Answer

$\left\{x| x \le 3.5\right\}$ Refer to the image below for the graph.

#### Work Step by Step

A bracket on the right means that $3.5$ is included in the set. Therefore, the set-builder form of the given interval is: $\left\{x| x \le 3.5\right\}$ To graph the interval, plot a solid dot at $x=3.5$, and then shade the region to the left of $3.5$. (refer to the attached image in the answer part for the graph).

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