Graphing Linear Inequalities
The graph of an inequality is a graph of a region rather
than a simple graph of a line. An inequality is actually the graph
of all the points on the coordinate plane that are either greater or
less than a particular line. For this reason, the graph of an inequality
looks similar to the graph of a line but has two major differences.
First, the region on one side of the line (which side depends on
the inequality) is shaded. Second, the line itself is either dotted
or solid depending on whether the inequality is inclusive.
To summarize the above graphs: when the inequality is
“greater than or equal to” or “less than or equal to,” the line
in the graph is solid; when the inequality is “greater than” or “less
than,” the line in the graph is dotted. Any point that satisfies
the inequality lies in the shaded region, and any point that does
not lies in the un-shaded region.
That’s all you need to know about graphing inequalities
for the Math IC.