The equation y=0.414^2 + 28.067x+173.541, with x equal to the number of years from 1986 to 1996 , models a company's spending (in millions of dollars). a. Graph this function for x= 0 to x= 10 . b. If x= 0 in 1986 , find the spending by this model in 2003 . c. Is the value in part b an interpolation or an extrapolation?