1. 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

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

3. Examples of Flipping the Sign

4. Graphing Inequalities on a Number Line

6. How to Graph the Inequality

7. Example 1

8. Example 2

9. Example 3

10. Example 4

11. Example 5

12. Example 6

13. You Try!

14. Example 7

15. 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.

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