This is applet is for investigating parallel and perpendicular lines.

**Parallel and Perpendicular Line Investigation**1. Look at the three lines and their equations color coded red, green and blue. Find the following: Red Line m = ________ b = _________ Blue Line m = ________ b = _________ Green Line m = ________ b = ________ 2. Move Point B to

**(1, 4)**and find the following: Red Line m = ________ b = _________ Blue Line m = ________ b = _________ Green Line m = ________ b = ________ 3. Move Point B to

**(3, 1)**and find the following: Red Line m = ________ b = _________ Blue Line m = ________ b = _________ Green Line m = ________ b = ________ 4. What do you notice about the

**slopes (m)**of the lines? Slopes of parallel lines are ________________. Slopes of perpendicular lines are _______________ and ________________. 5. Move Point B to the

**origin (0, 0)**and write the equations for the: Red Line Blue Line Green Line 6. What conclusions can you make based on the equations from part 5?