The graph shows stopping distances for trucks at various speeds on wet roads. Use this information to complete parts (a) and (b) below. Stopping Distance (feet) Stopping Distances at Selected Speeds 700- 655 600- 480 500- 400- 340 300 220 200- 100- 0- 30 40 50 60 a. Use the statistical menu of your graphing utility and the quadratic regression program to obtain the quadratic function that models a truck's stopping distance, f(x), in feet, on wet pavement traveling at x miles per hour. f(x)=x+x+ Speed (miles per hour)