For fall semester 2014, part-time students at Centenary College paid $575 per credit (unit or hour) for tuition and paid a mandatory part-time student fee of $15 per semester (Source: Centenary College). Let T be the total cost (in dollars) of tuition and the fee when taking c credits of courses.
a. Identify the explanatory and response variables.
b. Find the slope of a linear model. What does it mean in this situation?
c. Find an equation of the model.
d. Graph the model by hand.
e. What was the total one-semester cost of tuition plus part-time student fee for 9 credits of classes?