**TI83F* AppVariable file 03/21/07, 14:26° ŸGLA106Ÿnav 868E89BEB1644A6EA4327E33887122BEGLA106.GLA1061  absolute value¯absolute value:ÖThe absolute value of a number a is its distance from zero on a number line and is represented by | a |.ÖExample: The absolute value of -2 is 2, orÖ| -2 | = 2. boundaryKboundary:ÖA line or curve that separates the coordinate plane into regions. compound inequalityXcompound inequality:ÖTwo or more inequalities that are connected by the words AND or OR.  half-plane`half-plane:ÖThe two regions of the coordinate plane separated by the graph of a linear equation.  intersectionkintersection:ÖThe set of elements common to two or more sets as in compound inequalities and Venn diagrams. set-builder notation•set-builder notation:ÖA concise way of writing a solution set.ÖExample: {t | t < 17} represents the set of all numbers t such that t is less than 17. system of inequalitiesRsystem of inequalities:ÖA set of two or more inequalities with the same variables. unionŠunion:ÖThe graph of a compound inequality containing the word 'or'; the solution is a solution of either inequality, not necessarily both.z’