Does the table represent y as a function of x?

Which system of linear inequalities is represented by the graph?

Factor these polynomials and explain how 1. 12x - 3x^2 2. 20 - 240x^2

Let x have probability generating function gx (s) and let un generating function u(s) of the sequence uo, u1, satisfies p(x > n). show that the (1- s)u(s) = 1 - gx(s), whenever the series defining these generating functions converge.