Lesson 15: A Synthesis of Representations of Equivalent Ratio Collections

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Lesson 15: A Synthesis of Representations of Equivalent Ratio Collections

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Lesson 15: A Synthesis of Representations of Equivalent Ratio Collections. Exercise 1 - 3. - PowerPoint PPT Presentation

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Page 1: Lesson 15: A Synthesis of Representations of Equivalent Ratio Collections

Lesson 15: A Synthesis of Representations of Equivalent

Ratio Collections

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Exercise 1 - 3

• Create a table to determine how many views the website probably had after the first hour of airing the newscast, based on how many views it had on the second and third hour. Using this relationship, predict how many views the website will have after 4,5, and 6 hours.

Hours Views

1 12

2 24

3 36

4 48

5 60

6 72

Exercise 2: What is the constant number, c, that makes these ratios equivalent? 12Using an equation, represent the relationship between the number of views (v) the website received and the number of hours (h) after this morning’s news broadcast. 12h=v

Exercise 3:Use the table to identify sets of ordered pairs that can be graphed.(1,12), (2,24), (3,36), (4,48), (5,60), (6,72)

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Views Per Hour

# of viewers

Number of hours

0

12

24

36

48

60

72

84

1 2 3 4 5 6 7

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Exercise 5 Predict how many views the website will have after twelve hours. Use at least two representations (tape diagram, table, double number line) to justify

your answer.

Hours Views

1 12

2 24

3 36

4 48

5 60

6 72

7 84

8 96

9 108

10 120

11 132

12 144

12 1212 12 12 12 121212121212

12

12 x 12 = 144

0 1 2 3 4 5 6 7 8 9 10 11 12

0 12 24 36 48 60 72 84 96 108 120 132 144

12

Hours

Views

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Exercise 6: Also on the news broadcast, a chef from a local Italian restaurant demonstrated how he makes fresh pasta daily for his restaurant. The recipe for his

pasta is below:

• 3 eggs, beaten• 1 teaspoon salt• 2 cups flour• 2 tablespoons water• 2 tablespoons vegetable oil

• Determine the ratio of tablespoons of water to number of eggs.• Answer: 2:3

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Exercise 7 Determine how many tablespoons of water will be needed if the chef is making a large batch of pasta and the recipe increases to 36 eggs. Support your reasoning using at least one diagram you find applies best to the situation and explain why that tool is the best to use.

• • 24

• 36

• • 0 2 4 6 8 10 12 14 16 18 20 22 24

• 0 3 6 9 12 15 18 21 24 27 30 33 36

Tbsp. water

Eggs

2 3

4 66 98 1210 1512 1814 21

16 24

18 2720 3022 3324 36

12

12 12 12

12

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