Question

You are starting a dog-walking business around your neighborhood to earn some extra money. You can walk up to 9 dogs in a day and charge $9 to walk one dog. In order to increase your business, you notify your neighbors that you will charge $1 lesson per dog for the day for each additional dog you walk. The price (p) you charge per dog (d) is given by the function p=10-d. The function r=100-d^2 gives you the revenue (r) that you can expect to earn each day from walking the neighborhood dogs (d). Describe the graph of each function. You should graph each function separately.