The table below shows the number, in thousands, of vehicles parked in the central business district of a certain city on a typical Friday as a function of the hour of the day.Hour of the dayVehicles parked
(thousands)
9 A.M.6.1
11 A.M.7.6
1 P.M.7.7
3 P.M.6.6
5 P.M.4
(a) Use regression to find a quadratic model for the data. (Let V be the number of vehicles and t be the time in hours since midnight. Round the regression parameters to three decimal places.)
V =
(b) Express using functional notation the number of vehicles parked on a typical Friday at 4 P.M., and then estimate that value. (Round your answer to two decimal places.)
V = thousand
(c) At what time of day is the number of vehicles parked at its greatest?
12:13 P.M.
2:26 P.M.
10:13 P.M.
10:04 A.M.
12:26 A.M.