You already know how to use inequalities to describe domain and range. If an endpoint is included—shown by a closed dot, such as in the graph to the right—use <= or >= instead of ≤ or ≥ to indicate the number is included.

Complete the inequality for the domain.

−4 x 4

On a coordinate plane, a graph of an image with a curve and straight line has 2 points. A closed circle appears at (negative 4, negative 2) and an open circle appears at (4, 5).