**TI83F* AppVariable file 12/24/08, 18:23_ NGLA105NLnav 868E89BEB1644A6EA4327E33887122BEGLA105.GLA1051  boundaryKboundary:ÖA line or curve that separates the coordinate plane into regions. closed half-planeWclosed half-plane:ÖThe solution of a linear inequality that includes the boundary line. 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. open half-plane]open half-plane:ÖThe solution of a linear inequality that does not include the boundaryÖline. 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. unionŠunion:ÖThe graph of a compound inequality containing the word 'or'; the solution is a solution of either inequality, not necessarily both.µv