Unit 2 Review

Which graph shows a proportional relationship?

• A

• B

• C

• D

The graph shows the cost in dollars of pounds of 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 graph shows the cost in dollars of pounds of 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.

Andre rode his bike at a constant speed. He rode 1 mile in 8 minutes.

Which of these equations represents the amount of time (in minutes) that it takes him to ride a distance of miles?

• t=8d

• t= $\frac{1}{8}d$

• t=d + 7
  

• t = d - 7
  

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

• A

• B

The equation  $C=\frac{9}{5}F\ +\ 32$  relates temperature measured in degrees Celsius,C , to degrees Fahrenheit, F .
Determine whether there is a proportional relationship between  C and F.

• Proportional

• Not Proportional
  

Lena paid $27.39 for 3 pounds of walnuts.

What is the cost per pound of walnuts?

• $9.13

• $0.11

• $24.39

• $9.33

Lena paid $27.39 for 3 pounds of walnuts.

How much will it cost for 12 pounds of walnuts?

• $146.08

• $328.68

• $109.56

• $36.00

Anna paid $46.36 for 4 pounds of walnuts. What is the constant of proportionality (k) in this situation?

• 42.36

• 11.59

• 0.09

• 9.13

Lisa uses the equation c=7.25p to find the cost of the number of pizzas she will need to a party, where c represents the total cost of the pizzas and p represents the number of pizzas purchased.

What is the price for each pizza?

• $7.25

• $3.25

• None of the above