Question

The table shows the total number of bags of popcorn sold after the door to a movie theater was opened.

Between which two consecutive times was the average rate of change the greatest?



A. between Hour 1 and Hour 3

B. between Hour 3 and Hour 5

C. between Hour 5 and Hour 8

D. between Hour 8 and Hour 12

Answer 1

Do you know which one?

Answer 2

I don't know which one, because I don't look at answer choices.
But I can help you to find the answer.

Answer 3

ok

Answer 4

D?

Answer 5

they're the greatest numbers

Answer 6

The question asks
the \(average\) rate of change the greatest, which means that the difference has to be divided by the number of hours in the interval.
Give it another try.

Answer 7

ok just a sec

Answer 8

A?

Answer 9

I divided the bottom numbers

Answer 10

Can you state the answer instead of the letter?
This will avoid misunderstanding, and will help you check you answer unconsciously.

Answer 11

147/22

Answer 12

which gave me 6.8 while the other gave me 1

Answer 13

No, you got the wrong idea.
The numbers shown are cumulative, it said "number of bags sold \(after\) door was opened.
So you need to subtract consecutive numbers to get the number of bags sold during the period.

So you choose the maximum average number of bags.