The box plots show the average speeds, in miles per hour, for the race cars in two different races. average speeds of cars in race a 2 box plots. the number line goes from 120 to 170. for race a, the whiskers range from 120 to 170, and the box ranges from 143 to 165. a line divides the box at 153. for race b, the whiskers range from 125 to 165, and the box ranges from 140 to 150. a line divides the box at 145. average speeds of cars in race b one-half of cars travel at which speeds? between 120 and 143 mph in race a; between 125 and 140 mph in race b between 120 and 170 mph in race a; between 125 and 165 mph in race b between 120 and 153 mph in race a; between 125 and 145 mph in race b between 165 and 170 mph in race a; between 150 and 165 mph in race b