Proportion Review

• proportional

• proportion

• Determine if two ratios are proportional.

Use Unit Rates

Determine if the quantities in the pair of rates are proportional. Explain your reasoning and express the proportional relationship as a proportion.

20 rolls for $5; 48 rolls for $12

Write each rate as a fraction. Then find its unit rate.

÷5

÷5

÷12

÷12

Use Unit Rates

Answer: Since the rates have the same unit rate, they

are equivalent. The cost is proportional to the

number of rolls. So, .

1. A

2. B

3. C

4. D0% 0%0%0%

Determine if the quantities in the pair of rates are proportional. Explain your reasoning. 18 cookies for $6; 24 cookies for $8

A. No; the rates are not proportional.

B. Yes; the unit rates are the same, .

C. Yes; the unit rates are the same, .

D. Yes; the unit rates are the same, .

Use Unit Rates

Determine if the quantities in the pair of ratios are proportional. Explain your reasoning and express the proportional relationship as a proportion.

42 people on 7 teams; 64 people on 8 teams

÷7

÷7

÷8

÷8

Use Unit Rates

Answer: The number of people is not proportional to the number of teams.

1. A

2. B

3. C

4. D0% 0%0%0%

Determine if the quantities in the pair of ratios are proportional. Explain your reasoning. 16 students with 8 teachers; 30 students with 10 teachers

A. No; the ratios are not proportional.

B. Yes; the ratios are proportional, .

C. Yes; the ratio are proportional, .

D. Yes; the ratios are proportional, .

Use Unit Rates

FOOD You can buy 3 medium pizzas at The Pizza Place for $18 or 5 medium pizzas for $30. Are these selling rates proportional? Explain your reasoning.

÷3

÷3

÷5

÷5

Answer: Yes; since the unit rates are the same,

the rates are proportional.

1. A

2. B

3. C

4. D

0% 0%0%0%

FOOD At a farmer’s market, one farmer is selling 6 pumpkins for $12. Another farmer is selling his pumpkins 10 for $20. Are these selling rates proportional? Explain your reasoning.

A. No; the ratios are not proportional.

B. Yes; the unit rates are the same,

C. Yes; the unit rates are the same,

D. Yes; the unit rates are the same,

Determine if the quantities in the pair of rates are proportional. Explain your reasoning and express the proportional relationship as a proportion.

5 laps swum in 8 minutes; 11 laps swum in 16 minutes

Write each ratio as a fraction.

Use Equivalent Fractions

The numerator and the denominator are not multiplied by the same number. So, the fractions are not equivalent.

×2

?

Answer: No; Since the rates

are not proportional.

Use Equivalent Fractions

1. A

2. B

3. C

4. D0% 0%0%0%

Determine if the quantities in the pair of rates are proportional. Explain your reasoning.2 classes taken in 5 hours, 8 classes in 15 hours

A. No;

B. Yes;

C. Yes;

D. Yes;

Determine if the quantities in the pair of ratios are proportional. Explain your reasoning and express each proportional relationship as a proportion.

8 corrals with 56 horses; 4 corrals with 28 horses

The numerator and the denominator are divided by the same number. So, the fractions are equivalent.

Use Equivalent Fractions

÷2

÷2

?

Use Equivalent Fractions

Answer: Yes; Since , the

fractions are equivalent;

1. A

2. B

3. C

4. D0% 0%0%0%

Determine if the quantities in the pair of ratios are proportional. Explain your reasoning.10 cages with 25 birds, 2 cages with 5 birds

A.

B.

C.

D.

1. A

2. B

3. C

4. D

A. $24 B. $30

C. $32 D. $36

MONEY Admission to a local art museum is $8 for each adult. How much does it cost for 4 adults to attend the museum?

1. A

2. B

3. C

4. D

A. 10 min B. 15 min

C. 20 min D. 30 min

EXERCISE Kim can run 8 miles in 60 minutes. At this rate, how long will it take her to run 2 miles?

(over Lesson 6-2)

1. A

2. B

3. C

4. D0% 0%0%0%

A. 3 B. 4

C. 5 D. 6

Two pounds of ground beef will make 12 cups of chili. How many pounds of ground beef will Rashad need if he wants to make 18 cups of chili?

(over Lesson 6-2)

End of the

Lesson