Algebra 1: Section 3-1 Inequalities and Their Graphs.

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Presentation transcript:

Algebra 1: Section 3-1 Inequalities and Their Graphs

OBJECTIVES: To identify solutions of inequalities. To graph and write inequalities

A Solution of an Inequality… Is any number that makes the inequality TRUE. –Example: x<5 means that all number less than 5 are solutions of this inequality because all of those numbers make the inequality true.

Example 1 Is each number a solution of x > - 4.1?  -5  -4.1  8  0

Example 2 Is each number a solution of the given inequality?  2y + 1 < - 3  0  -2  1

Graph Using a Number Line a>4 b<- 2 c>0 d<5

Write an Inequality from a Graph:

Assignment Pg. 136: multiples of 3 (#3-48, 54-63)