Question

As front passed,the temperature changed steadily over 6 hours. altogether it changed -18 degrees. what was the change in temperature per hour for the 6 hours. explain.

Answer 1

The temperature changed steadily over the 6 hours, which means that it changed the same amount of degrees every hour.  It changed -18 degrees in 6 hours. 
Divide the temperature change by the number of hours.
-18 ÷ 6 = -3
The change in temperature per hour is -3°.