Can anybody help with this? pretty important

5/6+7/8what is the answer sealsdbdbshd

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.

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)