The document defines a polynomial function as a function of the form f(x) = Cnxn + Cn-1xn-1 + ... + C3x3 + C2x2 + C1x + C0, where Cn, Cn-1,...C3,C2,C1,C0 are constants and Cn ≠ 0, and n is a non-negative integer called the degree of the polynomial function. Some examples of polynomial functions of specific degrees are provided, including linear functions which are of degree 1 and quadratic functions which are of degree 2. The document also provides examples of functions that are not polynomial functions and examples of polynomial functions with their degrees identified based on the term