Exercise: Week Six Concept Check Post your 50-word response to the following: How can you determine if two lines are perpendicular? Post in your Individual Forum

Non vertical lines are perpendicular if the product of the slopes equal -1. So essentially, (M1) (M2) will equal -1. Also if you can make a little box (or 90 degree angle) then lines will are perpendicular. If one line is horizontal and another is vertical they will also be perpendicular.