Where's Waldo?

For this activity you need to make sure you know the relationship between parallel and perpendicular lines and their slopes.
The green line AB is the line you are going to try to find a line parallel to and perpendicular to. Once you think that you have the answer you will be able to see if you are correct. See below the picture BEFORE you start anything!

ACTIVITY #1:
Check the box for Activity #1. There should be 3 purple lines shown. You will need to find which line is parallel to line AB using the property of their slopes. Once you think you have found Waldo (the parallel line) check your answer!
ACTIVITY #2:
Uncheck Activity #1 checkbox and its answer. Now check Activity #2. Three blue lines should appear. Your task is to find the perpendicular line (Waldo) of the green line AB using slopes. Once you think you found Waldo check your answer!
CLOSING ACTIVITY:
Check all the boxes. Move the point A or B around. Do the Waldo lines stay parallel and perpendicular? Is there a relationship between the two Waldo lines? (These were the parallel and perpendicular lines to line AB.) Write a gerenal equation of a line that would be parallel to line AB then write another general equation for a line perpendicular to line AB.

Holly (Johnson) Phelps, July 31, 2008, Created with GeoGebra