Would the scenario be greater than the original, less than the original, or same as the original???

Which graph corresponds to the function f(x) = x2 + 4x – 1?

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.

Me. i can't figure out this question. give an explanation too. .