The percent pn of United States adults who met federal physical activity guidelines from 2007 through 2014 can be approximated by pn = 0.0061n3 ˆ’ 0.419n2 + 7.85n + 4.9, n = 7, 8, . . . , 14 where n is the year, with n = 7 corresponding to 2007. (Source: National Center for Health Statistics)

(a) Write the terms of this finite sequence. Use a graphing utility to construct a bar graph that represents the sequence.
(b) What can you conclude from the bar graph in part(a)?