The line equation in slope-intercept form is ,

where m is the slope and b is the y-intercept.

Calculate the slope,

m = 

    =                           (Substitute )

   =                                        (Multiply:)­­

    = .                                        (Cancel common terms)­­

The line crosses the y-axis at (0, 2). So the y-intercept is 2.

Substitute m = 1 and b = -4 in slope-intercept form line equation.

                                    (Multiplicative identity property: )­­

The slope-intercept form of the line equation is .