Heyoo.. lol this keyon guy better not delete my question +_+

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.

Need on this geometry question. explain how you did it.

Find the slope of the line passing through a pair of points