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Unformatted text preview: 9.4 Linear Inegualities in Two Variables and
Systems of Linear Inegualities Linear inequality in two variables  Can be written in one of the forms _‘ I A I
1/ lg . itLLL. Claudia Ax + By < C Ax + By s C / AX+By>CAX+By2C / /
z"  A, B, and C are real numbers, A and B are not
both 0. An ordered pair is a solution of the linear inequality Graph a Linear Inequality in Two Variables 1)Graph the boundary line found by replacing the
inequality sign with an equal sign. If the
inequality sign is > or <, graph a dashed
boundary line (indicating that the points on the
line are not solutions of the inequality). If the
inequality sign is 2 or s, graph a solid boundary
line (indicating that the points on the line are solutions of the inequality). 2)Choose a point, not on the boundary line, as a test point. Substitute into the original inequality. 3)If a true statement is obtained in Step 2, shade
the halfplane that contains the test point. If a
false statement is obtained, shade the halfplane that does not contain the test point. Graph 7X + y > —14 >_?+X‘'Lf
L. m . Graph 3X + By s 2 53 6 ~3X’1
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This note was uploaded on 01/16/2012 for the course MATH 096 taught by Professor Jimcotter during the Fall '11 term at Truckee Meadows Community College.
 Fall '11
 JimCotter

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