Question 436216
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Hi
Breaking it up into time intervals
6AM -3°F
9AM -3° + 2°*3 = 3°     |will rise at a rate of 2° per hour for 3 hr
3PM  3° + 3°*6 = 21°    |will rise at a rate of 3° per hour for 6 hr
6PM 21° - 2°*3 = 15°    |will fall at a rate of 2° per hour for 3 hr
8PM 15° - 5°*2 = 5°F    |will fall at a rate of 5° per hour for 2 hr