For spring semester 2009, a college charged $30 per unit (credit or hour) for tuition. All students paid a $3 student representation fee each semester. Students who drove to school paid a $50 parking fee each semester. Let T be the total one-semester cost (in dollars) of tuition and fees for a student who drove to school and took u units of classes.

Find an equation for u and T. The equation that describes the relationship between T and u is T =