Slope = Rise / Run
Slope = "change in y" / "change in x "
Since x = Days and y = Daily Revenue
(how much money they make each day)
then Slope = "change in daily revenue" / " number of day"
if m =400 then for each day, a net daily revenue of 400 dollars is gained
if m =100 then for each day, a net daily revenue of 100 dollars is gained
if m= 0 then for each day, no net daily revenue is gained