Question

A storm comes through, causing the temperatures to change drastically. Five hours after the storm, the temperature outside is 58 degrees. Nine hours after the storm, the temperature outside is 48 degrees. Choose the best sentence to express the UNIT RATE for the temperature change each hour after the storm.

A) The temperature decreases by 10 degrees per hour.
B) The temperature decreases by 2 degrees per hour.
C) The temperature decreases by 5 degrees per hour.
D) The temperature decreases by 9 degrees per hour.

Answer 1

The temperature decreases by 10 degrees per hour.

Step-by-step explanation:

To determine the unit rate for the temperature change each hour after the storm, we can calculate the difference in temperature between each time period.

Starting from 58 degrees and 9 hours later reaching 48 degrees, the temperature decreases by 10 degrees in 9 hours.

To express it as a unit rate per hour, we can divide the total temperature decrease (10 degrees) by the total time (9 hours), giving us a unit rate of 10/9.

Therefore, the best sentence to express the unit rate for the temperature change each hour after the storm is A) The temperature decreases by 10 degrees per hour.