A group of enterprising Math 121 students decide to make and sell earrings over the internet to earn some extra money for tuition during the summer holidays. When they price her earrings at $20 per pair, they do not get any orders. So they reduce their price to $15 per pair and they get 11 orders per day. Towards the end of summer, they decide to reduce their price further so that they can sell off their inventory. They notice that when they reduce their price to $5 per pair, they get so many orders per day, they cannot keep up with mailing out the orders. Assuming that the demand function, p, for their earrings is a linear-to-linear rational function of the number of pairs sold, q, find this rational function