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Polynomial and other nonlinear graphs: advanced

Problem

In the 'x''y'-plane, a hyperbola has vertical asymptote x=3 and horizontal asymptote y=1. The curve begins at the left and then diverges to infinity. It then re-enters from negative infinity and exits to the right.
A rational function is graphed in the xy-plane. Which of the following functions could be represented by the graph?
Choose 1 answer: