The line equation in slope-intercept form is , where m is the slope and b

is the y-intercept.

First find the slope of the line.

                    (Substitute )

                          (Product of two same signs is positive)

                          (Apply additive identity property: )

                                   (Add: )

Next find the y-intercept.

The line crosses the y-axis at (0, – 4).

So, the y-intercept is – 4.

Replace m with and b with – 4 in the equation.

The slope-intercept form line equation is .