The percentage, y, of college freshmen who smoke cigarettes decreased steadily from the year 2004 to the year 2014 and can be approximated by the linear equation y = -.46x + 6.32 where x represents the number of years since 2004. Thus, x = 0 represents 2004, x = 1 represents 2005, and so on.

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

(b) In 2014, approximately what percent of college freshmen smoked?

(c) In what year did approximately 2.6% of college freshmen smoke?