Rate of Change: Fun Word Problems for 7th Graders

A car travels 60 miles in 1 hour. What is the rate of change in miles per hour?

• 70 miles per hour

• 60 miles per hour

• 30 miles per hour

• 50 miles per hour

If a plant grows 3 inches every week, how tall will it be after 5 weeks?

• 15 inches

• 20 inches

• 12 inches

• 10 inches

A bike rental shop charges $15 for the first hour and $5 for each additional hour. Write an equation to represent the total cost based on the number of hours rented.

• total cost = 5h + 10 (for h > 1), total cost = 15 (for h = 1)

• total cost = 20 (for h = 1)

• total cost = 10h + 5

• total cost = 15h

A train leaves the station at 2 PM and travels at a speed of 80 miles per hour. How far will it have traveled by 4 PM?

• 200 miles

• 120 miles

• 160 miles

• 80 miles

A recipe requires 2 cups of flour for every 3 cups of sugar. If you want to use 6 cups of sugar, how many cups of flour do you need?

• 2 cups of flour

• 6 cups of flour

• 3 cups of flour

• 4 cups of flour

A swimming pool is being filled at a rate of 500 gallons per hour. How many gallons will be in the pool after 3 hours?

• 1000 gallons

• 1500 gallons

• 750 gallons

• 2000 gallons

If a phone plan costs $30 per month plus $0.10 per text message, write an equation for the total cost based on the number of text messages sent.

• C = 30 + 0.10x

• C = 30 + 0.20x

• C = 30 - 0.10x

• C = 30 + 0.05x

A factory produces 200 toys in 4 hours. What is the rate of production in toys per hour?

• 50 toys per hour

• 25 toys per hour

• 100 toys per hour

• 75 toys per hour

A runner completes a 5K race in 25 minutes. What is the runner's average speed in miles per hour? (1 mile = 1.60934 kilometers)

• 7.44 miles per hour

• 8.50 miles per hour

• 5.25 miles per hour

• 6.00 miles per hour

A bookstore sells novels for $10 each and textbooks for $20 each. If a customer buys 3 novels and 2 textbooks, how much will they spend in total?

• 60

• 80

• 50

• 70