the function p(x) = –0.015x^2 + 1.2x – 11.5 gives the profit, in thousands of dollars, when a company sells a new product at x dollars per unit. which of the following statements best interprets the average rate of change of this function from x = 50 to x = 55?the profit increases by $375 for every $1 increase in the selling price. the profit decreases by $375 for every $1 increase in the selling price. the profit increases by $1875 for every $1 increase in the selling price. the profit decreases by $1875 for every $1 increase in the selling price.