After door to door canvassing census workers determine the number of unoccupied homes The table shown to the right lists the number of homes in millions that were unoccupied in four census years Answer questions a through c Year x 1965 0 1975 10 1985 20 1995 30 a Use a graphing calculator to fit an exponential function to the data where x is the number of years after 1965 y Type integers or decimals rounded to six decimal places as needed Number of Unoccupied Homes in Census in millions 5 8 7 3 9 1 14 3