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The temperature changed throughout a certain day at a steady rate of
- 3 ° C every hour. If it was -8° C sometime between 2 pm and 2:20
pm, then the temperature was 9° C in the time interval

 

(Electric Pavlov tried to answer this, but he made the mistake of thinking it said "-9 degrees" meaning his solution was wrong.)

Please answer on the original thread: https://web2.0calc.com/questions/question-on-average-rate-of-change

 Feb 19, 2022
 #1
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Every 20 minutes, it goes down by 1 degree celsius.

That means from 1:40 to 2 it was -7 celsius. 1:20 to 1:40 -6, 1 to 1:20 was -5.

-2 was 12:00 to 12:20

1 was 11:00 to 11:20

4 was 10:00 to 10:20

7 was 9:00 to 9:20 => 8 was 8:40 to 9:00

you can generalize this, but:

-9*C was from 8:20 to 8:40 AM

 Oct 6, 2022

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