1. CC3 – Proportional Relationships
10/11/2016

2. Warm-Up
Gina ran 12 laps in 4 minutes. How many laps can Gina run per minute?

3. Warm-Up
Gina ran 12 laps in 4 minutes. How many laps can Gina run per minute?
Greg is deciding between buying a two-pack of pencils for $3.99 and a five-pack of pencils for $6.99. Which should he choose? Explain your answer using the unit rate.

4. Some Definitions
Equivalent Ratios: Any two ratios with the same unit rate
Proportional Relationship: A set of data is proportional if it has a constant unit rate

5. Proportional Relationships
Laps Ran
Minutes Passed 3 1

6. Proportional Relationships
Laps Ran
Minutes Passed 3 1 6 2

7. Proportional Relationships
Laps Ran
Minutes Passed 3 1 6 2 9

8. Proportional Relationships
Laps Ran
Minutes Passed 3 1 6 2 9 12 4 15 5 18 21 7

9. Proportional Relationships
Straight Line
Passes through the origin (0,0)

10. Is it proportional?
Miles
Hours 50 1 70 2 90 3
110 4

11. Is it proportional?
Miles
Hours 30 50 1 70 2 90 3
110 4

12. Is it proportional?
Miles
Hours 50 1 70 2 90 3
110 4 NO

13. Is it proportional?
Miles
Gallons 40 4 50 5 90 9
100 10

14. Then graph it!

15. Then graph it!