I need to find the slope-intercept form equation for the line shown in the graph

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.

What is another way to express 36 +32

How is working backward similar to solving an equation?