The slope is the relationship between the cost of the gym and how long you are there for. the y-intercept is how much it costs to go to the gym for no hours ie the start-up cost.
C.) 5, Using P.E.M.D.A.S you have to multiply first, so replacing the variable X with 5, it should look like this: (6*5) -3=27. 6*5 is 30, 30 subtracted by 3 is 27.
