Equation of a Line

What $y = m x + c$ means

Graph of the line y = 2x + 3 with y-intercept at (0,3) and a rise of 4 over a run of 2 labelled to show gradient 2

A straight line is usually written as $y = m x + c$ . In this form, $m$ is the gradient and $c$ is the y-intercept.

Equation of a Line Lesson