Fred is a licensee at ABC Reality and he has a listing to sell 123 Main St. The listing will not expire for 70 more days. If Fred decides to move his license to QRS Reality, what is the status of the listing

Four key marketing decision variables are price (p), advertising (a), transportation (t), and product quality (q). consumer demand (d) is influenced by these variables. the simplest model for describing demand in terms of these variables is: d = k – pp + aa + tt + qq where k, p, a, t, and q are constants. discuss the assumptions of this model. specifically, how does each variable affect demand? how do the variables influence each other? what limitations might this model have? how can it be improved?