One day at 3:00 a.m., the temperature was
–
13
°
F
in Kodiak, Alaska. At 10:00 a.m., the temperature was 22°F. What was the average change in temperature per hour?
There are 7 hours between 3:00 a.m. and 10:00 a.m.
The temperature increased by 22°F - (-13°F) = 35°F over 7 hours.
The average change in temperature per hour is 35°F ÷ 7 hours = 5°F per hour.