1. Constant Rate of Change and Slope 9.3

2. Rate of Change Rate of Change: describes how a quantity changes in relation to another Constant Rate of Change: The rate of change is the same between any two point. All Linear Functions have a Constant Rate of Change

3. Find the Constant Rate of Change in the table Hours (x) 1234 Feet (y) -12-14-16-18 +1 -2

4. Slope

5. Meet Joe….Joe Cool Joe has a disease, he can only walk to the right. Use Joe to help you find the slope Always start on the left to help Joe walk to the right

6. “slope” 3

7. Graph the line containing the points (-4,2) and (2,-3) and find the slope. 6

8. Slope of a Horizontal line (y=#) Always 0

9. What is the slope? (5,4) (-6,4) Horizontal line = “0” slope

10. Slope of a Vertical Line (x=#) Always Undefined

11. What is the slope? (3,8) (3,-2) Vertical line = “no slope”

12. Slope Formula

13. Find the slope of the line containing (2,2) and (8,9) 9-2 = 7 8-2 6

14. Find the slope of the line containing (-4,-6) and (3,-2) M= -2 - -6 = -2 + 6 = 4 3 - -4 3 + 4 7

15. Find the slope of the line containing (1,1) and (3,5)

16. Adventures of Slope Dude http://www.youtube.com/watch?v=ZzU8x5cM R-w http://www.youtube.com/watch?v=ZzU8x5cM R-w

17. Homework Page 400 (7-22) all