3/4x8/9 as simpiest form

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.

Ineed me i stuck and i don’t want to get it wrong

Aline passes through 3,7 and 6,9 what equation represents the line