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Unformatted text preview: lgfio # Hole; 3.6 Graphing Linear Inequalities Review:
Solving an inequality is the same as solving an equation, except that when you multiply or divide by a negative number, you have
to switch the inequality sign around. Example:
Solve for y: 3x  2y > 6
"Ex '?>x
s1 ? 232$ +Lo
..2_ ‘2— :5: Graphing a Linear Inequality in Two Variables Solve the inequality for y. Graph the line as you would for an equation.
Use a solid line for s or 2: use a dashed line for < or >. If y z shade everything above the line.
If y s shade everything below the line. Examples:
Graph 3x  2y > 6 Y4EX“3 Y To graph the intersection or union of two inequalities: Graph each ineq uality. The intersection is where they ole/ﬂap.
The union is the combination of the two graphs. Examples:
Graph the intersection of x s 2 and y 2 x + 1 Homework: p. 198 # 121 odd (Bonus: 69, 70)
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This note was uploaded on 05/13/2011 for the course MTH 110 taught by Professor Helenius during the Spring '08 term at Grand Valley State University.
 Spring '08
 HELENIUS

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