Direct Proportion Review

Jane paints clay figurines to sell at a craft fair. The graph shows that the number of figurines she paints, y, is directly proportional to the number of days she paints, x. Find the constant of proportionality.

• 5

• 10

• 15

• 2.5

The distance that an automobile travels is directly proportional to the time it travels. If the car travels 280 miles in 7 hours, how far will it travel in 12 hours?

• 480

• 1960

• 84

• 25

y is directly proportional to x, and y = 12 when x = 3. Find the constant of proportionality.

• 1/4

• 36

• 4

• 15

Does the following equation represent a direct proportion? If so, name the constant of proportionality.

• yes; 20

• no

• yes; 4/5

• yes; 1/20

A family makes homemade pickles. They pick the pickles at a rate of 80 pickles per 5 jars. Which answer choices best represent packing y pickles in x jars at that rate? Select TWO correct answers.

The cost of 54 tickets to a water park is $972. Each ticket costs the same amount.

Which table or equation represents the relationship between the number of tickets, t, and the total cost of the tickets, c?

Select TWO correct answers.

Tags

6.6.C

A recipe for pastry requires 160g of sugar to make 320g of pastry. How many grams of sugar will be needed to make 40g of pastry?

A recipe for pastry requires 180g of sugar to make 540g of pastry. How many grams of sugar will be needed to make 5400g of pastry?

Answer the following questions.

c

d

g

i

f

yes

no

y=4500x

10,500

10

y = 1500x

4500

1,500

y=10x

100

p is directly proportional to m, and p = 128 when m = 8. Find p when m = 10.

• 16

• 12.8

• 120

• 160