## anonymous one year ago Help?

1. anonymous

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 $0.10. 2. anonymous @dan815 3. anonymous @hartnn 4. AlexandervonHumboldt2 you see that the difference between 15.95-14.95, 16.95-15.95, 17.95-16.95 and 18.95-17.5 all equals to 1$. each 10 min=1$what do you think the answer is? 5. AlexandervonHumboldt2 woops i meant 18.95-17.95 instead of 18.95-17.5 6. anonymous I think it is A. 7. AlexandervonHumboldt2 yes you are correct 8. anonymous Thank you!!! 9. AlexandervonHumboldt2 np 10. anonymous it wasn't A 11. anonymous 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

12. anonymous

So B?

13. anonymous

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

14. anonymous

idk 0.1?

15. anonymous

yeah, that's your rate of change

16. anonymous

so every 1 minute more of talk adds $0.10 to the bill 17. anonymous Sooooo B? 18. skullpatrol Don't question yourself, instead convince yourself you have the right answer. 19. anonymous YES BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB???? 20. anonymous does that match the rate of change you found? 21. anonymous Im confused because he said no when i said B so idk witch one it is. 22. anonymous 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.

23. anonymous

B correct?

24. skullpatrol

Only YOU can remove that question mark.

25. anonymous

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

26. skullpatrol

lol

27. anonymous

thats my brain rn

28. anonymous

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

29. anonymous

Its b

30. skullpatrol

that is the nature of math

31. anonymous

Happy no questiomark @skullpatrol

32. skullpatrol

good job :-)