The linear function y = 22 + 25 models the average
cost of a haircut in a certain city, where y, is the average price of a haircut a years after 1985. Find the slope for the model. Then describe what this means in terms of the rate of change in the average cost of a haircut over time.
a) m=
2
b) The average cost of a haircut in this city increased (Enter: increased or decreased or not
changed) at a rate of per year after 1985. JUST NEED THE RATE PLSS !