| absolute value | the value of a number without regard to its sign |
| boundary line | a line that represents the edge of a linear inequality: if points along the boundary line are included in the solution set, then a solid line is used; if points along the boundary line are not included in the solution set, then a dashed line is used |
| bounded region | the set of solutions that are true for all of the linear inequalities under consideration |
| coordinate plane | a plane in two dimensions, containing the x- and y-axes, used to map ordered pairs in the form (x, y) |
| inequality | a math sentence that defines a range of numbers; inequalities contain the symbols <, ≤, >, or ≥ |
| linear inequality | an inequality represented in a form equivalent to Ax + By > C, where the symbol > could also be <, ≤, or ≥ |
| Properties of Inequality | a set of rules for inequalities that describe how addition, subtraction, multiplication, or division can be applied to both sides of an inequality in order to produce an equivalent inequality |
| ray | a half-line beginning at one point and continuing to infinity |
| slope-intercept form | a linear equation, written in the form y = mx + b, where m is the slope and b is the y-intercept |