Determine whether the given function is a polynomial function, a rational function, or some other function. F(x) = x2 - 9 by x - 3 polynomial rational other State the degree of the polynomial function. (If an answer does not exist, enter DNE.) Determine whether the given function is a polynomial function, a rational function, or some other function. F(x) = x2 - 9 by x - 3 polynomial rational other State the degree of the polynomial function. (If an answer does not exist, enter DNE.)