You can put this solution on YOUR website! Graphing an inequality starts by graphing the corresponding straight line. After graphing the line, there are only two additional steps to remember.
Choose a point (usualy we choose a point (0,0) on the line and see if it makes the inequality true. If the inequality is true, you will shade THAT side of the line -- thus shading OVER the point. If it is false, you will shade the OTHER side of the line -- not shading OVER the point.
If the inequality is LESS THAN OR EQUAL TO or GREATER THAN OR EQUAL TO, the line is drawn as a solid line. If the inequality is simply LESS THAN or GREATER THAN, the line is drawn as a dashed line.
follow this link to see an example:
W3C Web site
