1. Bell Work Find the unit rate: $54 6 lbs 500 miles 10 hours $42___ 6 people $9.00 per pound 50 miles per hour $7.00 per person

3. A proportion is an equation that states that two ratios are equivalent. Example: 2 12 3 18 5 15 9 27 Proportions = =

4. If one of the numbers in a proportion is unknown, mental math can be used to find an equivalent ratio. Example 1: 2 6 3 x x 3 2 6 3 x Hint: To find the value of x, multiply 3 by 3 also. 2 6 3 9 x 3 = = =

5. If one of the numbers in a proportion is unknown, mental math can be used to find an equivalent ratio. Example : 28 7 32 x 28 7 32 x Hint: To find the value of x, divide 32 by 4 also. 28 7 32 8 4 = = = 4 ÷ ÷

6. Circle all of the ratios that are equivalent.

7. Solve the proportion using equivalent ratios? 4 20 16 20 10

8. 5 30 2 12 In a proportion, the cross products are equal. = They are a proportion because they equal the same number

9. Check using cross products!

10. Use cross products to solve the proportion?

13. You Try: Use cross products to solve the proportion?

14. You Try: Solve the proportion?

15.  Proportion is a statement that says two ratios are equal. ◦ In an election, Damon got three votes for each two votes that Shannon got. Damon got 72 votes. How many votes did Shannon get? ◦ Damon Shannon n = 48, so Shannon got 48 votes.

16.  Tires cost two for $75. How much will four tires cost? ◦ # of tires cost n = 150, so four tires cost $150