Lesson 2.4 Solving and Graphing Inequalities Concept: Solving Inequalities in One Variable EQ: How can I solve and graph an inequality in one variable?

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Presentation transcript:

Lesson 2.4 Solving and Graphing Inequalities Concept: Solving Inequalities in One Variable EQ: How can I solve and graph an inequality in one variable? (Standard: REI.3) Vocabulary: Inequality, Less than, Less than or equal to, More than, More than or equal to, No more than, No fewer than

How to Solve Inequalities If you multiply or divide by a NEGATIVE number, you must flip your inequality sign! Flip the Sign Video

Examples of Flipping the Sign

Graphing Inequalities on a Number Line

How to Graph the Inequality

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

You Try!

Example 7

Example 8 If 5 times a number is increased by 4, the result is at least 19. Find the least possible number that satisfies these conditions.

You Try! The sum of twice a number and 5 is at most 15. What are the possible values for the number?