Destiny hand-makes trinkets that she sells over the internet. When she sets the price of a trinket at$20, she does not get any orders at all. When she reduces the price of a trinket to$13, she can sell 20 trinkets within a day. When she further reduces the price of a trinket to $6, she notices she cannot keep up with the demand as orders keep pouring in. A Math 121 student notices that Destiny's trinket business follows a linear-to-linear rational demand function of price, p, in terms of quantity, q. You are this Math 121 student. Help Destiny generate this demand function.