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

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 $-2$ is negative, and is located $2$ units to the left of 0.