This states graph the solution set of linear inequalities in two variables. Now in inequalities all you have to do is choose a test point or a pair of coordinates and plug them into the inequality. If the final statement is false then shade the opposite region but if it is true shade that region. Here is a video explaining: http://www.youtube.com/watch?v=7sInE5tGJX4&feature=player_detailpage.
This was tuff for me considering I missed this once on a test, but I still passed the test.
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