Parallel Lines in the Coordinate Plane: Quick Exploration


In the applet below,
1. Toolbar ImageUse the line tool to construct a line.
2.Toolbar ImageUse the parallel line tool to construct a line that is parallel to the line you constructed in (1).
3.Toolbar ImageUse the slope tool to measures and display the slopes of both lines.
4. Toolbar ImageSelect the move tool. Move any one (or more) of these points around.
Once done, please answer the questions that appear below the applet.

From what you've observed, what can we conclude about any two (non-vertical) lines drawn in the coordinate plane?

If a line has a slope of zero, then it

Check all that apply