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

First find the y-intercept value.

                       (Substitute 0.5 for m)

                   (Substitute 6, 4 for x, y)

                             (Multiply: )

Apply subtraction property of equality: If a = b than a c = b c.

                (Subtract 3 from each side)

Apply commutative property of addition: .

                      (Apply Additive inverse property: )

                            (Apply Additive identity property: )

                                  (Subtract: )

Substitute 0.5 for m and 1 for b in the slope-intercept form equation.

The line equation in slope-intercept form is .