Slopes and Angles (1)

Use the sliders (or input boxes) to make lines j and k parallel.

How can you tell the lines (in the previous app) are parallel? [br][i][br](Hint[/i]: The LARGE POINTS on each line are moveable.)

Use the sliders (or input boxes) to make lines j and k parallel. Make sure you get a pair of slopes different from the ones you created in the previous app.

Same directions as above, yet this time create a pair of parallel lines in a manner different from the two ways you did above.

Notice anything interesting? If so, describe. What exactly causes lines (graphed in the coordinate plane) to be parallel?

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Information: Slopes and Angles (1)