Tolerable Physics

My Truck has been stolen out of the school parking lot! Thank goodness I've attached an antenna which transmits the odometer reading every minute. My home computer picks it up, and stores the data. Can the students use the data, and the corresponding distance vs time graph it creates, to tell how fast the thief was driving? They will be comparing this to local speed limits, to figure which streets the thief takes. They can also tell how far they drove, and use an included map with marked locati