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.