Is the relation shown below a function? Use the graph below to justify your response (0, 0), (2, 0), (2, 2), and (3, 4)

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.