Step 1: Calculate the slope of the given line equation

          NOTE: Putting the equation in the form y = mx (+c) and attempting to  

            extract  the m 

Step 2: Find the slope of the another line

          NOTE: i) Parallel lines have the same slope.

          ii) Perpendicular lines have slopes that are opposite reciprocals, like

           \frac{a}{b} \text{ and } \frac{-b}{a} The slopes also have

          a product of -1.

Step 3: Use the slope of line and a point on line to find its y-intercept.

            EXAMPLE: Plug the slope m = -2 and the point (-6, 4) into the

            slope-  intercept formula. Then solve for the y-intercept b.

                        y = mx + b

                        4 = -2(-6) + b

Step 4: Use the slope of line and the y-intercept of line to find the equation of the line.

            EXAMPLE: Plug the slope m = -2 and the y-intercept b = -8 into the

            slope- intercept  formula.

                              y = mx + b

                              y = -2x + -8