1. Review 1) How do you enter a set of data into your graphing calculator? How do you find a line of best fit for that set of data? 2)Find the length and midpoint of the segment with endpoints (2, -4) and (-6, 0) 3) Use interval notation and inequality notation to describe the graph. 4 0

2. Answers: 1) Press "stat" and "enter" to begin entering data into the calculator. Press "stat" and arrow over to "calc". Then, select "LinReg (ax + b)". Once that is on the main display screen, press "enter" to calculate the equation. 2)length ≈8.9 midpoint: (-2, -2) 3)(-∞, 4); x < 4

3. Guided Practice for Sect. P.3 Ex 1:Solve each equation. a)4 - 2x = 3x - 6

4. Ex 1: b)3(5x - 3) - 4(2x + 1) = 5x - 2

5. On Your Own 1)2x - 3 = 4x - 5 2)2(3 - 4z) - 5(2z + 3) = 5z - 2

6. Answers: 1)x = 1 2)z = 8/19 (≈.42)

7. Guided Practice for Sect. P.3 Ex 2:Solve each inequality. Write your answer in both inequality and interval notation and graph the solutions on a number line. a)x + 3 > 5

8. Ex 2: b)-9 < 2x + 5 < 7

9. On Your Own Solve each inequality. Write your answer in both inequality and interval notation and graph the solutions on a number line. 1)2x - 1 < 4x + 3 2)-1 < 3x - 2 < 7

10. Answers: 1)-2 -2) [-2, ∞) 2)1/3 < x < 3 [1/3, 3] 0 0 -2 1/3 3

11. Guided Practice for Sect. P.3 Ex 3:Solve each inequality and graph the solutions on a number line. a)1 - 3x < 7

12. Ex 3: b)-20 < 5 - 2y < 15

13. On Your Own Solve each inequality and graph the solutions on a number line. 1)3x - 1 > 6x + 8 2)2(5 - 3x) + 3(2x - 1) < 2x + 1

14. 0 0 -3 3 Answers: 1)x < -3 (-∞, -3] 2)x > 3 [3, ∞)