Algebra 1a: Chapter 2, Lesson 2, page 59.
Rational Numbers
“Any number that can be expressed as the ratio of two integers, `a/b`, is called a rational number.
There is a point on the number line for every rational number. The number is called the coordinate of the point and the point is the graph of the number. When we draw a point for a number on a number line, we say that we have graphed the number.”