I need help with this question

Is this a polynomial function? i need to know asap

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.

True or false? the sum of the differences (% - 7) is never zero for any distribution consisting of n observations.