We found that the marketing research department for the company that manufactures and sells memory chips for microcomputers established the following price-demand and revenue functions: p(x) = 85 - 3X Price-demand function R(x) = xp(x) =x(85 - 3x) Revenue function where p(x) is the wholesale price in dollars at which x million chips can be sold, and R(x) is in millions of dollars. Both functions have domain 1 sx s 17. (A) Which of the following is the graph of the revenue function? O A. O B. O c. 600- -200- 400- -400- 200- -600- 0 5 10 15 20 -20-15-10 -5