The distance a car drives, in miles, is proportional to the number of gallons of gas it uses. This graph shows this relationship. Select from the drop-down menu to correctly complete the statement. The unit rate is Choose... . 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 comma 0, 1 comma 21, 5 comma 105. A line is drawn through the points, starting at the origin.