Slope-Intercept Form

Slope-Intercept Form is a way of writing the equation of a straight line as:

$y = mx + b$

Where $m$ is the slope (how much $y$ changes for each unit increase in $x$) and $b$ is the y-intercept (the value of $y$ where the line crosses the y-axis, when $x = 0$).

For example, $y = 2x + 3$ is a line that rises 2 units for every 1 unit across and crosses the y-axis at $(0, 3)$. See Linear Function.