Austin is in the business of manufacturing phones. He must pay a daily fixed cost to rent the building and equipment and also pays a cost per phone produced for materials and labor. Let C represent the total cost, in dollars, of producing p phones in a given day. A graph of C is shown below. Write an equation for C, then state the slope of the graph and determine its interpretation in the context of the problem. 1300 1200 1100 1000 900 $800 700 600 500 400 300 200 100 0 1 2 3 4, 5 6 7 8 9 Number of Phones Manufactured 10 Note: The line drawn is dotted because the domain of the function is limited to the integers 11 P​