MATH SOLVE

5 months ago

Q:
# 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 phone0 $14.95 10 $15.95 20 $16.95 30 $17.95 40 $18.95 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.

Accepted Solution

A:

Monthly cost of cell phone for 0 minutes is $19.95 and for 40 minutes of talk is $21.95.

It means that average rate of change ( increase of monthly cost for each minute of talk time ) is: ARC = ( 21.95 - 19.95 ) / ( 40 - 0 ) = 2.00 / 40 = $0.05.

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

It means that average rate of change ( increase of monthly cost for each minute of talk time ) is: ARC = ( 21.95 - 19.95 ) / ( 40 - 0 ) = 2.00 / 40 = $0.05.

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