1. INVESTIGATION 2: Comparing & Scaling RATES 2.1 Sharing Pizza
Learning Target:
I can determine whether two ratios are equivalent
or find which of the two is more favorable.
Homework Inv 2 Day 1: Complete p. 4 and correct with the EDpuzzle CS Inv 2 Day 2.
Warm-Up:
Madhavi took 20 minutes to run ¼ mile. If she continues at this rate, how many miles will she run in 180 minutes?
Set up and solve a proportion:

3. p. 2

4. 4 pizzas 10 campers 3 pizzas 8 campers 4 10 16 40 3 8 15 40
It is hard to compare tenths and eighths, both numerators are just a bit under half.
Find a common denominator! 40
The Large table will get slightly more pizza per person than small table.
4 pizzas
10 campers
3 pizzas
8 campers 4 10 16 40 3 8 15 40 = =

5. Selena is incorrect.
She found the difference between pizzas and people.

6. Tony is correct.
He focuses on the ratio of pizzas to people.

7. Small Tables x = 60 pizzas x pizzas 3 pizzas = 160 campers 8 campers

8. Large Tables x = 64 pizzas x pizzas 4 pizzas = 160 campers 10 campers

9. It should be close to 0.4 or 0.37 of a pizza per person.
Extra Large Tables
About 9 to 10 pizzas on each extra large table.
x pizzas
25 campers =
x pizzas
25 campers
4 pizzas
10 campers
x pizzas
25 campers
3 pizzas
8 campers = =

10. Extra Large Tables x = 64 pizzas x = 58 or 59 pizzas Answers may vary!
25 campers
x pizzas
160 campers
x = 64 pizzas
(6.4 or about 7 tables) =
9 pizzas
25 campers
x pizzas
160 campers
x = 58 or 59 pizzas
(6.4 or about 7 tables) =