Chapter 3 - Graphing Linear Functions - 3.2 - Linear Functions - Exercises - Page 117: 1

$y=mx+b$

A linear equation with two variables $x$ and $y$ is an equation which can be written in the form $y=mx+b$, where $m$ and $b$ are constants. This form of a linear equation is called the slope-intercept form. The missing term of the given sentence si $y=mx+b$.