Main Concept

Inequalities can be represented graphically:

$y\>f\left(x\right)$ is the set of points above the graph of $y\=f\left(x\right)$.

$y\ge f\left(x\right)$ is the set of points above or on the graph of $y\=f\left(x\right)$.

$y<f\left(x\right)$ is the set of points below the graph of $y\&equals;f\left(x\right)$.

$y\le f\left(x\right)$is the set of points below or on the graph of $y\&equals;f\left(x\right)$.

The combination of multiple such inequalities is represented as the intersection of the sets mentioned above.

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