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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.

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Other answers:

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?
woops i meant 18.95-17.95 instead of 18.95-17.5
I think it is A.
yes you are correct
Thank you!!!
np
it wasn't A
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
So B?
no. what's 1/10 as a decimal?
idk 0.1?
yeah, that's your rate of change
so every 1 minute more of talk adds $0.10 to the bill
Sooooo B?
Don't question yourself, instead convince yourself you have the right answer.
YES BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB????
does that match the rate of change you found?
Im confused because he said no when i said B so idk witch one it is.
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.
B correct?
Only YOU can remove that question mark.
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lol
thats my brain rn
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
Its b
that is the nature of math
Happy no questiomark @skullpatrol
good job :-)

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