Jose is a salesperson who sells computers at an electronics store. He makes a base pay amount each day and then is paid a commission as a percentage of the total
dollar amount the company makes from his sales that day. Let P represent Jose's
total pay on a day on which he sells z dollars worth of computers. A graph of P is
shown below. Write an equation for P then state the slope of the graph and
determine its interpretation in the context of the problem.