The data shown below were obtained by time-lapse photography on a highway. Use regression analysis to fit these data to the Greenshields model and determine the following. Speed (mi/h) Density (veh/mi) 18.4 26.7 33.4 41.1 53.8 56.0 (a) the mean free speed (in mi/h) mi/h 80 65 50 36 15 10 (b) the jam density (in veh/mi) X The response you submitted has the wrong sign. veh/mi (c) the capacity (in veh/h) veh/h (d) the speed at maximum flow (in mi/h) mi/h

The data shown below were obtained by time-lapse photography on a highway. Use regression analysis to fit these data to the Greenshields model and determine the following. Speed (mi/h) Density (veh/mi) 18.4 26.7 33.4 41.1 53.8 56.0 (a) the mean free speed (in mi/h) mi/h 80 65 50 36 15 10 (b) the jam density (in veh/mi) X The response you submitted has the wrong sign. veh/mi (c) the capacity (in veh/h) veh/h (d) the speed at maximum flow (in mi/h) mi/h