Question

Cedric rents a pressure washer from the hardware store to clean his driveway. The table below shows data from the last three times Cedric rented a pressure washer.

Select all of the following that describe the unit price of renting a pressure washer from the hardware store.

A. If the hardware store charged by the minute, the rate would be $0.05 per minute.
B. It costs $9 per hour to rent a pressure washer.
C. If the hardware store charged by the minute, the rate would be $0.20 per minute.
D. It costs $12 per hour to rent a pressure washer.

Answer 1

The correct answer is option B. It costs $9 per hour to rent a pressure washer.

To determine the unit price of renting a pressure washer, we can analyze the given data, specifically the relationship between the number of hours rented and the corresponding cost.

1. **Calculate the Rate per Hour:**

- For 4 hours, the cost is $36, resulting in a rate of $36/4 = $9 per hour.

- For 5 hours, the cost is $45, leading to a rate of $45/5 = $9 per hour.

- For 7 hours, the cost is $63, giving a rate of $63/7 ≈ $9 per hour.

2. **Analyze the Given Statements:**

- Statement A suggests a rate of $0.05 per minute, which is not consistent with the hourly rates provided.

- Statement B aligns with the calculated rate of $9 per hour.

- Statement C suggests a rate of $0.20 per minute, which is not in line with the hourly rates.

- Statement D suggests a rate of $12 per hour, which is also inconsistent with the calculated rate.

Therefore, correct Option: B. It costs $9 per hour to rent a pressure washer.