Slope intercept form

Slope-intercept form is a way to write linear equations given by the equation y = mx + b. Slope-intercept form makes it easy to graph a linear equation because you know the slope (m) and y-intercept (b) of the line.

Given a point and the slope of a line, you can write a linear equation in slope-intercept form.

Example

m = 3 ; (3, 5)

y = mx + b
(5) = (3)(3) + b
b = 5 - 9 = -4
y = 3x - 4

See also slope, y intercept.