Which relation is a function?

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

Which one ? is the answer and how to find this answer

3women sell hats at a craft fair weekly. the money they make at the fair is split into categories. 9% goes to pay taxes. $55 goes to pay rent for the space they sell in. the rest is split between the women. if the group make $706 at the fair, how much does each women get paid once the money is divided