A highway department is studying the relationship between traffic flow and speed. The following model has been hypothesized. y = 0 + 1 x + 2 x 2 + where y = traffic flow in vehicles per hour x = vehicle speed in miles per hour The following data were collected during rush hour for six highways leading out of the city. Traffic Flow (y) Vehicle Speed (x) 1,257 36 1,329 45 1,227 35 1,335 45 1,350 50 1,124 30 Enter negative values as negative, if necessary. Show the estimated regression equation (to 3 decimals, if necessary). = + x + x 2 What is the value of the coefficient of determination (to 3 decimals)? Note: report R 2 between 0 and 1. What is the value of the F test statistic (to 2 decimals)? What is the p-value? Select Using = .01, what is your conclusion? Select Predict the traffic flow in vehicles per hour for a speed of 39 miles per hour (to the nearest whole number).