Quiz about Proportions

Question 1

Tammy uses x-many liters of water and y-many scoops of sugar to make various amounts of lemonade.

x (liters)|y (scoops)

4L|16scoops

5L|20scoops

7L|28scoops

8L|32scoops

Do x and y have a proportional relationship? If so, what is the constant of proportionality? [___] scoops per liter

Accepted Answer

yes, 4

Answer

no

Answer

yes, 16

Answer

yes, 12

Answer

yes, lemonade

Question 2

Lila likes to make lemonade using the lemons from her grandmother's trees. The graph shows the proportional relationship between the number of pitchers of lemonade Lila wants to make, x, and the number of lemons she needs, y. What does the point D represent?

Accepted Answer

She needs 70 lemons to make 14 pitchers of lemonade

Answer

She needs 14 lemons to make 70 pitchers of lemonade

Answer

She needs 14 pitchers and 70 scoops of sugar

Answer

She needs 70 pitchers and 14 scoops of sugar

Answer

D doesn't represent anything. It's just a dot on a line.

Question 3

Solve for $$y$$ in the proportion $$\frac{y}{6} = \frac{12}{18}$$ .

Accepted Answer

4

Answer

6

Answer

8

Answer

10

Question 4

If the ratio of boys to girls in a class is 3:4, how many boys are there if there are 20 girls?

Accepted Answer

15

Answer

25

Answer

10

Answer

30

Question 5

What is the constant of proportionality?

Accepted Answer

$9

Answer

$3

Answer

$4

Answer

$2

Question 6

Select all ratios equivalent to 10:22.

Accepted Answer

40:88

Accepted Answer

50:110

Accepted Answer

15:33

Answer

56:55

Answer

22:10

Question 7

Which ratio is greater? 16:8 or 14:7

Accepted Answer

The ratios form a proportion

Answer

16:8

Answer

14:7

Answer

Not enough information

Question 8

Stan can fill his bottle with x-many ounces of water in y-many seconds at the water fountain.

x (ounces)|y (seconds)

4oz|36s

5oz|45s

9oz|81s

11oz|99s

Do x and y have a proportional relationship? What is the equation that describes this relationship?

Accepted Answer

yes, y = 9x

Answer

no

Answer

yes, y = 4x

Answer

yes, x = 4y

Answer

yes, x = 9y

Question 9

Out of every $100 that Judy earns at her part-time job, she saves $25 for college. The amount she saves is directly proportional to the amount she earns. If she earns $3,880 in a year, how much will she save for college?

Accepted Answer

$970

Answer

2,134

Answer

1,552

Answer

$644

Question 10

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?

Accepted Answer

2.5 cups milk

Answer

1.75 cups milk

Answer

2 cups flour

Answer

2.25 cups milk

Question 11

12 ounce shampoo bottle lasts Mike 16 weeks. How long would you expect an 18-ounce bottle of the same brand to last him?

Accepted Answer

24 weeks

Answer

6 weeks

Answer

30 weeks

Answer

20 weeks

Question 12

About 13 out of 20 homes have a personal computer. On a street with 60 homes, how many would you expect to have a personal computer?

Accepted Answer

39 homes

Answer

7 homes

Answer

73 homes

Answer

40 homes

Question 13

A 6-ounce package of fruit snacks contains 45 pieces. How many pieces would you expect in a 10-ounce package?

Accepted Answer

75 pieces

Answer

25 pieces

Answer

35 pieces

Answer

70 pieces

Question 14

Of the 50 fish John caught from the lake, 14 were trout. The estimated population of the lake is 7,500. About how many trout would you expect to be in the lake?

Accepted Answer

2,100 trout

Answer

2,000 trout

Answer

2,200 trout

Answer

2,300 trout

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