Many of the United States’ prominent public universities are shifting to admitting more out-of-state students. The percentage of freshmen at the University of Alabama who are from out-of-state x years after 2004 is given approximately by the linear equation y = 3.6x + 28.

(a) What interpretation can be given to the y-intercept of the graph of the equation? 

(b) Approximately what percentage of freshmen entering the University of Alabama in 2009 were from out of state?

(c) If this trend continues, in what year will approximately 82% of the University of Alabama freshmen be from out of state?