Unit 2 Review

Which graph represents a proportional relationship?

• A

• B

• C

• D

The graph shows the cost in C dollars of pounds of W blueberries, a proportional relationship.

Select all the true statements.

• 1 pound of blueberries costs $2.75.

• 2.75 pounds of blueberries cost $1

• 5 pounds of blueberries cost $15.50.

• 12 pounds of blueberries cost $33

• The point (3, 9) is on the graph of the proportional relationship.

The two lines represent the amount of water, over time, in two tanks that are the same size. Which container is filling more quickly?

• Tank A

• Tank B

• Both are filling at the same rate

Complete the table so that there is a proportional relationship between the number of apples and their weight.

• 0.12 kg

• 0.24 kg

• 8.3333 kg

• 16.6666 kg

The equation F=1.8C+32 relates temperature measured in degrees Celsius, C to degrees Fahrenheit, F.

• Yes, it represents a proportional relationship because it is an equation.

• Yes, it represents a proportional relationship because you are multiplying by 1.8.

• No, it is not proportional because you are adding 32.

• No, it is not proportional because it is different variables.

A recipe for salad dressing calls for 3 tablespoons of oil for every 2 tablespoons of vinegar. The line represents the relationship between the amount of oil and the amount of vinegar needed to make salad dressing according to this recipe. The point (1, 1.5) is on the line.

• 1 tablespoon of oil and 1.5 tablespoons of vinegar

• 1 tablespoon of vinegar and 1.5 tablespoons of oil

• 1.5 tablespoon of oil and 1.5 tablespoons of vinegar

• 1 tablespoon of oil and 1 tablespoons of vinegar

Write an equation that represents the proportional relationship between oil (y) and vinegar (v).

• y=1v

• y=1.5v

• v=1.5y

• v=1y

Does the graph represent a proportional relationship? If so, what is the constant of proportionality?

• It is not proportional.

• It is proportional, the constant of proportionality is 10.

• It is proportional, the constant of proportionality is 5.

• It is proportional, the constant of proportionality is 2.

A trail mix recipe asks for 4 cups of raisins for every 6 cups of peanuts. There is a proportional relationship between the amount of raisins, r (cups), and the amount of peanuts, p (cups), in this recipe. Which of equations represents this proportional relationship? Select all that apply.

• r=2/3p

• r=3/2p

• p=2/3r

• p=3/2r