Which of the following are polynomial functions? check all that apply
(answers in picture)

A, C, and E are all polynomial functions.

Polynomial functions must have terms that have non-negative integer exponents.  We can rewrite function B,  as:



The exponent 1/2 is not an integer exponent.

We can also rewrite the function D, , as:



We have a negative exponent, so this is not a polynomial.