Bobby is celebrating his sixtieth birthday by vacationing in Europe. He decides to travel around by train, so he can relax and enjoy the scenic views. The cost of a train ride includes a flat fee plus an additional charge per kilometer of the trip. This table shows the relationship between the distance Bobby travels (in kilometers), x, and the cost of the trip (in euro), Y. x (kilometers) y (euro) 40 30 60 37 80 44 100 51 According to the values in the table, do x and y have a proportional relationship? yes no