Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.3 - The Real Numbers - Exercise Set - Page 42: 17


The blue dot indicates the graph of the number.

Work Step by Step

The distance from 0 to 1 is called the unit distance. Numbers to the right of the origin (0) are positive and numbers to the left of the origin are negative. Real numbers are graphed on a number line by placing a dot at the correct location for each number. The number $-1.8=-1\displaystyle \frac{4}{5}$ is negative, and is located $1.8$ units to the left of 0. (Or, $0.8$ (four fifths of the unit distance) to the left of $-1$)
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