The scatter plot shows data relating the total amount of a monthly telephone bill to minutes used. A line of best fit has been drawn.
Telephone Cost
100
90
80
70
60
Total Bill (dollars)
50
40
30
20
10
0
30 60 90 120 150 180 210 240 270 300
Minutes Used
The equation for the line of best fit is shown.
y = kx + 15
Based on the line of best fit, how many minutes used would result in a total bill of $105?
A.
420 minutes
B.
405 minutes
C.
480 minutes
D.
360 minutes