A train travelling at 120km/hr goes through a tunnel 155m long. Calculate in seconds, the time a passenger on the train spends in the tunnel

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )