Refer to the graphs you made for problem 3-43 (it was a homework problem in Lesson 3.1.2). Use those graphs to help you graph each of the following inequalities.
Which region is shaded, above or below?
If you aren't sure, make a guess. Substitute a point from the region you guessed into the inequality. If it makes the inequality true, you guessed correctly. If it makes the inequality false, try a point from the other region.
Which region of the graph is shaded, left or to the right?
Use the eTool below to help solve the problem.
Click the link at right for the full version of the eTool: 3-63 HW eTool