a. Why are the lines whose equations are and y = −3x − 2 perpendicular?b. Use a graphing...

a. Why are the lines whose equations are and y = −3x − 2 perpendicular?

b. Use a graphing utility to graph the equations in a [−10, 10, 1] by [−10, 10, 1] viewing rectangle. Do the lines appear to be perpendicular?

c. Now use the zoom square feature of your utility. Describe what happens to the graphs. Explain why this is so.