Ratios, rates and unit rates

What is the unit rate for the following situation:

Alice drives 250 miles in 5 hours. 

•  $\frac{250\ miles}{5\ hours}$ 

•  $\frac{50\ miles}{1\ hr}$ 
  

•  $\frac{125\ miles}{2.5\ hrs}$ 
  

•  $\frac{1\ hr}{50\ miles}$ 
  

What is the unit rate for the following situation:

The pasta costs $2.60 for 20 ounces. 

•  $\frac{\text{}0.13}{1\ ounce}$ 

•  $\frac{2.60}{20\ ounces}$ 
  

•  $\frac{1.30}{10\ ounces}$ 
  

•  $\frac{20\ ounces}{2.60}$ 
  

What is the unit rate for the following situation:

There are 116 students in 4 rooms. 

•  $\frac{1\ class}{29\ students}$  
  

•  $\frac{4\ classes}{116\ students}$ 
  

•  $\frac{116\ students}{4\ classes}$ 
  

•  $\frac{29\ students}{1\ class}$ 
  

It cost me $46.80 to fill my 13-gallon gas tank. What was the price of gas per gallon?

• $3.40

• $3.30

• $3.60

• $3.55

Which is the better buy? A 12-pack of Pepsi for $3.50 or a 6-pack for $1.80?

• 6 pack

• 12 pack

• They're the same

• Neither, I prefer Coke

You're throwing a party, and you ordered 15 pizzas for your guests. Your total came to $97.50. What was your unit cost per pizza?

• $4.95 per pizza

• $6.50 per pizza

• $7.25 per pizza

• $5.75 per pizza

If Maya makes $10 an hour at her after school job, how many hours will it take her to earn $150?

• 10 hours

• 15 hours

• 5 hours

• 20 hours

Does the table represent a proportional relationship?

• yes
• no

The number of trees and the number of apples are given in the table above.  Determine which statement below is correct.

• The table is not proportional because the unit rate is not constant.
• The table is proportional and the unit rate is 1/13
• The table is proportional and the unit rate is 13.
• The table is not proportional because it doesn't pass through the origin.

The cost, c, of potato salad by its weight in pounds, p, at a deli is given in the table above.  Which equation best models this data.

• c = .29p
• c = 3.5p
• p = .29c
• p = 3.5c