The line equation in slope-intercept form is ,

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

Calculate the slope,

m = 

    =                         (Substitute )

    =                               (Product of two same signs is positive)

    =                                  (Add: )

   =                                     (Divide: )­

The line crosses the y-axis at (0, -8). So the y-intercept is -8.

Substitute m = -3 and b = -8 in slope-intercept form line equation.

                            (Product of two different signs is negative)

The slope-intercept form of the line equation is .