The distance a car drives, in miles, is proportional to the number of gallons of gas it uses. the graph shows this relationship. a line graph, titled distance traveled by a car, representing the relationship between gas in gallons and distance in miles. the following points are plotted (0, 0), (1, 21,) and (5, 105). a line is drawn through the points, starting at the origin. select from the drop-down menu to correctly complete the statement. the unit rate is .