Please someone help me I can’t fail

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

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.

2.5 milligrams is equivalent to how many grams