Pro & Non Functions, Unit Rate, Direction Variation

A bookshelf contains 15 books that each have the same width. The combined width for all 15 books is 12 inches. Which graph has a slope that best models the width of each book?

• A

• B

• C

• D

Trina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $187.15, what should she earn if she worked 40 hours? 

• $394
• $440
• $472.80
• $512.20

Tags

CCSS.7.EE.B.3

CCSS.7.RP.A.2

CCSS.7.RP.A.3

At a restaurant 600 customers were served during a 10-hour period of time. Which graph has a slope that best represents the number of customers that were served per hour at this restaurant?

• F

• H

• G

• J

The cost of 6 pencils at a store is 30 cents. Each pencil has the same cost. Which graph has a slope that best represents the cost of each pencil at this store?

• F

• G

• H

• J

The mass of a substance varies directly with the volume of the substance. The volume of 100 kilograms of the substance is 80 liters.

What is the volume, in liters, of 3.2 kilograms of this substance?

• 2.12 cubic liters

• 4 cubic liters

• 6.34 cubic liters

• 2.56 cubic liters

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Which mapping represents y as a function of x?

• A

• B

• C

• D

Oscar buys his lunch in the school cafeteria. The cost of 15 school lunches is $33.75. Which graph has a slope that best represents the average cost of the lunches in dollars per lunch?

• A

• B

• C

• D

An aquarium is being filled with water. The graph shows the height of the water over time as the aquarium is being filled. Which statement best describes the rate of change for this situation?

• The height of the water increases 20 inches per second.

• The height of the water increases 1 inch per second.

• The height of the water increases 5 inches per second.

• The height of the water increases 2.5 inches per second.

Which representation best describes a proportional relationship between x and y?

• A

• B

• C

• D

The table shows y as a function of x. Which ordered pairs can also belong to the function? Select TWO correct answers.

• (-4, 3)

• (-2, 3)

• (4, 3)

• (6, 8)

• (9, 8)