Train A traveled 173 miles in five hours. For Train B, y = 31.35x represents its rate of speed over the same five hours. Which train traveled at a faster rate and by what factor? (round to nearest tenth) A) Train B by a factor of 3.2 B) Train A by a factor of 3.2 C) Train B by a factor of 1.1 D) Train A by a factor of 1.1