So over here we have Ben is running at a constant velocity of 3m/s to the east, three meters per second to the east and this is a review, this is a vector quanity they are giving us the magnitude and the direction, if they just said three meters per second then that would just be speed, this is the magnitude its 3m/s and it is to the east and they are giving us the direction so this is a vector quantity that's why it's velocity instead of speed.