Slopes of Perpendicular Lines[br][br][br]The purpose of this activity is to explore the relationships of the slopes of perpendicular lines. Lines a and b have been constructed to be perpendicular. Use point B to drag the shape. [br][br]Perpendicular Lines[br][br]1) How do you know these lines are perpendicular? [br][br][br][br][br]2) What is the slope of line a? Why?[br][br][br][br]3) What is the slope of line b? Why?[br][br][br][br][br][br]4) Click point B and drag it to (0, 2) on the coordinate plane. What do you notice about the slopes?[br][br][br][br][br][br]5) Now drag point B to (0, -4) on the coordinate plane. What do you notice about the slopes?[br][br][br][br][br]6) Take a few minutes to drag point B to any point on the coordinate plane. Form a conjecture about the slopes of perpendicular lines.