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? (1 point)

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.

Question

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? (1 point)

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.

Maddie2005 · Answer

It's not A or B

Mercury · Answer

to calculate the average rate of change, pick two points from the table (for example, you could use 
(0, $14.95) and (10, $15.95) )
and apply the slope formula. from there, think about what the slope represents (average increase in the dependent variable, per unit 1 increase of independent variable)