Explanation:
Your graph will have a vertical asymptote at x = 1, as the denominator x - 1 cannot equal zero. Therefore, f(1) is not posssible. Then, plugging in test values for the function on the left side of the asymptote...
... you will find that your graph needs to include the following points:
So therefore, your graph must cross through the above points, and may never cross the vertical line x = 1.