Graphing Inequalities with 2 variables:
Steps:

Make the y in the slope intercept form equation, y = mx + b on one side and put everything else on the
To graph inequalities, we graph them the same way you graph a regular line: slope intercept form y = mx + b. First, plot the y intercept (b) on the y axis. Next, use the slope (m) to plot the second point; if the slope is a whole number, put it over 1, and plot it by doing "rise over run."
If the inequality has a less than or greater than sign, this means that the boundary line will be dotted. If the inequality has a less than or equal to or greater than or equal to sign, this means that the boundary line will be solid.
Once you have graphed the line, you've already graphed the "or equal to" part (it's just the line without the shading); now you need to shade where the corresponding inequality sign. If the sign is less than or less than or equal to, shade under the line. If the sign is greater than or greater than or equal to, shade under the line.*
If you can't remember this, than you can substitute a point in place [ex:(0,0)] the statement is false, so you should shade the region that does not contain (0,0).

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Shows and explains how to graph inequalities with one or two variables.