Does anyone know the answer to this question?

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Kapil needed to buy a long wooden beam. he went to two sawmills that each charge an initial fee plus an additional fee for each meter of wood. the following equation gives the price (in dollars) of a wooden beam from the first sawmill as a function of its length (in meters). p = 5+20xp=5+20x

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?