A graph with distance in miles at left and time in hours at bottom. Distance is marked off in increments of 100 from zero at bottom to 600 at top. Time is marked off in one hour increments from zero at left bottom to four at right. A diagonal line with a starting point at zero hours and 50 miles progresses to one hour at 150 miles, two hours at 275 miles, three hours at 400 miles, and four hours at 525 miles.