3. Have you ever stood at the top of a ski hill and read the signs? Bunny Run Main Street Wipe Out Terminator What do these signs tell you?

4. They are all descriptions of how steep (dangerous) each hill is. This is all you need if all you are doing is snowboarding. What if you were an engineer and you wanted to build a roller coaster

5. How would you describe the steepness of these rides if you were an engineer?

7. Engineers have created a mathematical measure for the steepness of a line Slope: The measure of a line’s steepness

8. Rise Run Slope = Rise Run

9. 8cm 16cm Slope = Rise Run 8cm 16cm = 0.5 =

10. Find the slope of the line: Slope = Rise Run = 2cm 8cm = 1 4 8cm 2cm

11. Find the slope of the vertical line: Slope = Rise Run = 4cm 0cm = undefined 0cm 4cm

12. Find the slope of the horizontal line: Slope = Rise Run = 0cm 10cm = 0 0cm 10cm

13. Step Count Technique Count the number of steps going from left to right.

14. 5 2 m = 5 2

15. 2 4 2 4 1 2

16. -5 2 m = -5 2

17. McGraw Hill Pg 259 1-5,8,10, 12,13,14 16,17 Homework 21