Developing Proportional Reasoning

Multiple Choice

The local Rec League orders 8 soccer balls for every 12 students. The table shows how many soccer balls the league orders for a certain numbers of students. How many soccer balls do you predict the league would order for 48 students?

• 36

• 40

• 32

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Multiple Choice

Which of the following ratios are NOT equivalent to 5:6?

• 10:12

• 15:18

• 16:20

• 20:24

Categorize

Options (8)

(6, 8)

(9, 12)

(15, 20)

(21, 28)

(1, 2)

(6, 4)

(24, 30)

(36, 60)

Ned sells 3 cookies for $4.

Sort the ordered pairs into the correct categories below!

EQUIVALENT RATIOS

NOT EQUIVALENT

Multiple Choice

What will students use to understand how a proportional relationship can exist between quantities?

• Models

• Graphs

• Equations

• Diagrams

Multiple Choice

What is the ratio of flour to water in the pizza dough recipe?

• 3:1

• 2:1

• 4:1

• 1:1

Multiple Choice

What is the ratio of cups of flour to cups of water in one batch?

• 1:3

• 3:1

• 2:1

• 4:1

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Multiple Choice

A cake recipe calls for 1.5 cups of milk and 3 cups of flour. Seth made a mistake and used 5 cups of flour. How many cups of milk should he use to keep the proportions correct?

• 2.5 cups milk
• 1.75 cups milk
• 2 cups flour
• 2.25 cups milk

Open Ended

Is the relationship proportional? Explain how you know.

Multiple Choice

What will be the ratio of Pedro's age to his brother's age in five years?

• 19:12

• 12:19

• 14:12

• 19:14

Multiple Choice

The table shows how a cell phone store calculates items from its checking register. Based on the table, which equation represents a non-proportional relationship?

• p=12.5c-24,500

• r=1.75w

• s=55.95c

• w=10.25h

Open Ended

Is the relationship between the vinegar and water in the recipe and the vinegar and water in Elyse’s cleaning solution a proportional relationship? Explain.

Fill in the Blanks

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Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident