In problem 2a, would the length of the height change if you messured it from a different point on the same base?​

Taking algebra two apex courses and need with these questions

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.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.