1. 2.2 Slope of a Line

2. Slope

3. 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

4. “slope” 3

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

7. Slope of a Horizontal line (y=#) Always 0 HOY H: horizontal line 0: 0 slope Y: y= #

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

10. Slope of a Vertical Line (x=#) Always Undefined VUX V: Vertical Line U:Undefined slope X: X=#

11. What is the slope? (3,8) (3,-2) Vertical line = “undefined”

13. Slope Formula

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

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

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

17. Find the Slope from a table Hours (x) 1234 Feet (y) -12-14-16-18 +1 -2

19. A line contains points (5, 3) and (x, 9) and has slope = 3. Find the value of x. 3= 9-3 x-5 3 = 6 x-5

20. A line contains points (9, -5) and (-8, k) and has slope = 0. Find the value of k.

21. Homework TB: Page 53 (1-3 all, 7-18 all, 22-34 even)

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