Choose any point and substitute its coordinate into the inequality. If the inequality remains TRUE then the region containing the inequality is the one that you want. If it is false, then you want the region on the other side of the line.
You can choose any point in the plane and substitute its coordinates into the inequality. The origin is usually the simplest.
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The shaded area of the graph of an inequality show the solution to the inequality. For example, if the area below y = x is shaded it is showing those ordered pairs which solve y < x.
a graph
we should prevent inequality by
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Pick a sample point in the shaded area and plug it into the equation and see if it makes it true.