3) Use the following general linear demand function below: Q =a+ bP + cM + ap R where Q. = quantity demanded, P = the price of the good, M = income, ^ = the price of a good related in consumption. For the general linear demand function given above a. AQ / AM =C. b. d is the effect on the quantity demanded of the good of a one-dollar change in the price of the related good, all other things constant. C. b is the effect on the quantity demanded of the good of a one-dollar change in the price of the good, all other things constant. d. all of the above