A transportation engineer wants to determine the number of vehicles that drive through an intersection on a given day. The following table shows the total number of vehicles that drove through the intersection over a 10 -hour period.
Number of Hours Number of Vehicles
1 45
2 92
3 140
4 190
5 242
6 290
7 350
8 405
9 460
10 520

The transportation engineer determines that the linear function that best models the data is y=-16.7333+52.7515 x, where y represents the total number of vehicles that drove through the intersection and x represents the number of hours. The following graph shows the residuals for this function.