Question

3. The outside temperature decreases

by 7°F in 3 hours.
Part A
How would you represent the
temperature change as a unit rate?
Express your answer as an integer.
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Part B
If the temperature continues to
decrease at this rate, what will be
the change in temperature after 5
hours?

Answer 1

Part A: 2

Part B: 10° F

Explanation:

Part A

The rate of change is calculated by dividing the difference in temperature by the time.

rate of change = (7°F)/(3 1/2 hours)

rate of change = 7/3.5

rate of change = 2

Answer: 2

Part B

The rate of change tells us that each hour that passes, the temperature decreases by 2° F.

In 5 hours, 5 × 2 = 10, so the change in temperature will be 10° F.

Answer: 10° F