Use the slope formula: m = (y2 – y1) / (x2 – x1)
Identify two points on the line
Substitute the coordinates into the formula
Simplify the fraction
If the line is horizontal, the slope is 0
If the line is vertical, the slope is undefined
If the equation is in slope-intercept form, use the coefficient of x
If the equation is in standard form, solve for y first
Compare rise over run on a graph
Count the vertical change and the horizontal change
Reduce the slope to simplest form