graphing on a rectangular coordinate

1. Identify and discuss a real-world application of graphing on a rectangular coordinate system. You may need to search the web for reference. Cite any website you use.

1. Identify and discuss a real-world application of graphing on a rectangular coordinate system.  You may need to search the web for reference.  Cite any website you use.

2. If you had to explain to a friend how to graph a line, how would you do so?  Use a specific line to illustrate.