Answer: I think it is b
Explanation:
I believe that this would be representative.
Average rate of the function: 3
Step-by-step explanation:
The function in this problem is

The average rate of change of a function over an interval
is given by

where
are the values of the function calculated in
respectively
For the function in this problem we have:
, so

, so

So, the average rate of change is

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Answer:
2.1 months
Step-by-step explanation:
Let x represent the number of months
Set up expressions to represent the cost of each Internet provider
40x + 39 will represent the first one
30x + 60 will represent the other
Set these equal to each other and solve for x:
40x + 39 = 30x + 60
10x + 39 = 60
10x = 21
x = 2.1
So, the cost will be the same in 2.1 months