Unit Rates and Ratios: Proportionality in Action

A recipe calls for 3 cups of flour for every 2 cups of sugar. What is the constant of proportionality between flour and sugar?

• 2.0

• 1.0

• 0.75

• 1.5

If a car travels 150 miles on 5 gallons of gas, what is the unit rate of miles per gallon?

• 25 miles per gallon

• 30 miles per gallon

• 40 miles per gallon

• 35 miles per gallon

A school is planning a field trip and needs to rent buses. If 4 buses can carry 160 students, how many students can 10 buses carry?

• 250 students

• 400 students

• 300 students

• 350 students

A fruit vendor sells apples at a rate of 5 apples for $3. What is the cost of 12 apples?

• $9.00

• $7.20

• $5.00

• $10.50

If a runner completes 10 laps in 25 minutes, what is the constant of proportionality in laps per minute?

• 1 lap per minute

• 0.5 laps per minute

• 0.2 laps per minute

• 0.4 laps per minute

A painter can paint 3 rooms in 2 days. How many rooms can the painter complete in 5 days?

• 7

• 10

• 5

• 8

A recipe requires 4 tablespoons of oil for every 6 servings. How much oil is needed for 15 servings?

• 12 tablespoons

• 10 tablespoons

• 6 tablespoons

• 8 tablespoons

If a cyclist rides 24 miles in 2 hours, what is the unit rate in miles per hour?

• 20 miles per hour

• 15 miles per hour

• 10 miles per hour

• 12 miles per hour

A factory produces 500 toys in 8 hours. How many toys does it produce in 1 hour?

• 75

• 50

• 100

• 62.5

If a book costs $15 and you buy 4 books, what is the constant of proportionality for the cost per book?

• 2.50

• 5.00

• 3.75

• 4.00