Use the price-demand equation below to find the revenue function. Sketch a graph of the revenue function, and indicate the regions of inelastic and elastic demand x =f(p) =54 -6vp R(P) = Which graph below is the graph of the revenue function? O A. O B. AR(P) O c. AR(P) OD. 20 AR(P) 650- AR(P) B 20 P P 85 85 Region A in the graph of the revenue function is Region B in the graph of the revenue function is