Constant Rate Word Problems

The waiting time to ride a roller coaster is 20 minutes when 150 people are in line.  How long is the waiting time when 240 people are in line?

• 90 min

• 30 min

• 32 min

• 30 min

A shop produces 39 wetsuits every 2 weeks.  How long will it take the shop to produce 429 wetsuits?

• 18 wk

• 20 wk

• 22 wk

• 24 wk

David hikes 2 ¼ miles in ½ an hour.What is his rate in miles per hour?

• 4.5

• 7/6

• 67

• 6.8

At 4 P.M., the level of the water in the lake was 10 feet. At 8 P.M., the level of water was 2 feet. Determine the constant rate of change of the water.

• 4 feet per hour

• -2 feet per hour

• 2 feet per hour

• 10 feet per hour

Ashton is depositing money into a checking account. After 3 months there is $120 in the account. After 6 months, there is $240 in the account. Determine the constant rate of change of the account.

• $80/month

• $20/month

• $40/month

• $60/month

The temperature at noon was 90°F. By 4 P.M., the temperature was 74°F. Determine the constant rate of change of the temperature.

• 10°F per hour

• -4°F per hour

• -2°F per hour

• 4°F per hour

Sara was 45 inches tall. Eighteen months later, she was 54 inches tall. Determine the constant rate of change for Jaz’s height.

• 0.5 inches per month

• 0.25 inches per month

• 2 inches per month

• 1 inch per month

At 3 P.M., there were 20 jellyfish on the beach. At 5 p.m., there were 44 jellyfish. What is the constant rate of change?

• 2 jellyfish per hour

• 4 jellyfish per hour

• 8 jellyfish per hour

• 12 jellyfish per hour

At 2 P.M., there were 30 seagulls on the beach. At 4 P.M., there were 50 seagulls. What is the constant rate of change?

• 5 seagulls per hour

• 10 seagulls per hour

• 20 seagulls per hour

• 15 seagulls per hour

John had $200 in his savings account. After 4 months, he had $280 in the account. Determine the constant rate of change of the account.

• $30/month

• $20/month

• $40/month

• $50/month