5.5_bzca5e

# 5.5_bzca5e - Section 5.5 Systems of Inequalities Linear...

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Section 5.5 Systems of Inequalities

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Linear Inequalities in Two Variables and Their Solutions
A solution of an inequality in two variables, x and y, is an ordered pair of real numbers with the following property: When the x-coordinate is substituted for x and the y-coordinate is substituted for y in the inequality, we obtain a true statement. Each ordered-pair solution is said to satisfy the inequality.

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The Graph of a Linear Inequality in Two Variables
A half-plane is the set of all points on one side of a line. A half plane is the graph of an inequality that involves > or <. The graph of an inequality that involves or is a half-plane and a line. A solid line is used to show that a line is part of a graph. A dashed line is used to show that a line is not part of a graph.

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Example Graph: y -2x+3 -4 -3 -2 -1 1 2 3 4 5 -4 -3 -2 -1 1 2 3 4 x y
Example Graph: y 3x-4 -4 -3 -2 -1 1 2 3 4 5 -4 -3 -2 -1 1 2 3 4 x y

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Graphing Linear Inequalities without Using Test Points

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Example -4 -3 -2 -1 1 2 3 4 5 -4 -3 -2 -1 1 2 3 4 x y Graph the inequality on the graph below: x -2

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Example -4 -3 -2 -1 1 2 3 4 5 -4 -3 -2 -1 1 2 3 4 x y Graph the inequality on the graph below: y 1
in Two Variables

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## This document was uploaded on 10/26/2011 for the course FKP bmfp at UTEM Chile.

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5.5_bzca5e - Section 5.5 Systems of Inequalities Linear...

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