1. 2-5 Solving Equations Involving Absolute Value Objectives: 1.Evaluate absolute value expressions. 2.Solve absolute value equations. A.REI.1 Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method. A.REI.3 Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.

2. Which type of book in the survey is the least popular? With a 3-point margin of error, the number of people who chose popular fictions could be as high as what percent? As low as what percent? How would you represent the margin f error in the percent of people that chose religious books with an absolute value equation?

3. Expressions with absolute values define an upper and lower range in which a value must lie.

4. Example 1: Evaluate

6. Example 2: Solve each equation. Then graph the solution set.

8. Example 3: The average January temperature in a northern Canadian city is 1°F. The actual January temperature for that city may be about 5°F warmer or colder. Write and solve an equation to find the maximum and minimum temperatures.

9. Example 4: Write an equation involving absolute value for the graph. a) b)

10. Practice WS 2-5

11. Homework Pages 105 – 108: 1-9, 15, 29, 32, 33, 35, 37, 39