1. Is every polynomial function a rational function? Explain your answer and provide an example.
2. Given a rational function, identify a method which can be used to determine if there is a vertical asymptote.
3. Suppose a rational function R(x) has the horizontal asymptote y = 3/2. Explain the behavior of the function as the variable x increases without bound.
4. How can the graph of f(x) = 3^x be used to obtain an estimate of the square root of 3?
