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2 answers:
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Answer:
The average rate of change is -3.
Step-by-step explanation:
Given : Function over the interval 2 ≤ x ≤ 4.
To find : What is the average rate of change ?
Solution :
Function over [2,4]
The rate of change is the slope of the line,
So,
Substitute,
Therefore, The average rate of change is -3.
now, there are 12 months in a year, so 18 months is really 18/12 of a year, thus