Question

Help?

Answer 1

A cell phone plan has a monthly cost that is shown in the table below. What is the correct statement regarding the average rate of change during the 40-minute time of talk?

Total minutes of talk time Monthly cost of cell phone
0 $14.95
10 $15.95
20 $16.95
30 $17.95
40 $18.95

The average rate of change is $1.00, meaning that for every ten minutes of talk time, the monthly bill increases by $1.00.
The average rate of change is $1.00, meaning that for each minute of talk time, the monthly bill increases by $0.10.
The average rate of change is $0.10, meaning that for every ten minutes of talk time, the bill increases by $0.10.
The average rate of change is $0.10, meaning that for each minute of talk time, the monthly bill increases by $0.10.

Answer 2

@dan815

Answer 3

@hartnn

Answer 4

you see that the difference between 15.95-14.95, 16.95-15.95, 17.95-16.95 and 18.95-17.5 all equals to 1$.

each 10 min=1$

what do you think the answer is?

Answer 5

woops i meant 18.95-17.95 instead of 18.95-17.5

Answer 6

I think it is A.

Answer 7

yes you are correct

Answer 8

Thank you!!!

Answer 9

np

Answer 10

it wasn't A

Answer 11

you have to divide the difference in cost by the difference minutes. You know the cost changes by $1/month. the minutes are changing by 10.

rate of change = 1/10

Answer 12

So B?

Answer 13

no. what's 1/10 as a decimal?

Answer 14

idk 0.1?

Answer 15

yeah, that's your rate of change

Answer 16

so every 1 minute more of talk adds $0.10 to the bill

Answer 17

Sooooo B?

Answer 18

Don't question yourself,
instead convince yourself you have the right answer.

Answer 19

YES BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB????

Answer 20

does that match the rate of change you found?

Answer 21

Im confused because he said no when i said B so idk witch one it is.

Answer 22

A) The average rate of change is $1.00, meaning that for every ten minutes of talk time, the monthly bill increases by $1.00.

B) The average rate of change is $1.00, meaning that for each minute of talk time, the monthly bill increases by $0.10.

C) The average rate of change is $0.10, meaning that for every ten minutes of talk time, the bill increases by $0.10.

D) The average rate of change is $0.10, meaning that for each minute of talk time, the monthly bill increases by $0.10.

Answer 23

B correct?

Answer 24

Only YOU can remove that question mark.

Answer 25

????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Answer 26

lol

Answer 27

thats my brain rn

Answer 28

ok. starting from the top, the rate of change is
\[\frac{ y_2-y_1 }{ x_2-x_2 }\]
Pick two points from your table, the y's are the cost and the x's are the minutes

Answer 29

Its b

Answer 30

that is the nature of math

Answer 31

Happy no questiomark @skullpatrol

Answer 32

good job :-)