Mary was performing experiments in her science class. When she started the experiment, the temperature was 20°F. After 1 hour, the temperature was 0°F. What is the best way to represent the change in temperature that occurred over that hour?
Mary was performing experiments in her science class. When she started the experiment, the temperature was 20°F. After 1 hour, the temperature was 0°F. What is the best way to represent the change in temperature that occurred over that hour?
20°F
10°F
-10°F
-20°F