A car is traveling on a highway. The distance (in miles) from its destination and the time (in hours) is given by the equation d = 420 minus 65 t. What is the slope of the line represented by the equation? What is the practical meaning of the slope? a. M = 420; The total distance is 420 miles. B. M = 65; The car is traveling 65 miles per hour. C. M = negative 65; The car is traveling 65 miles per hour. D. M = negative 420; The total distance is 355 miles. Please select the best answer from the choices provided A B C D.