23) Plot the graph of the function.

Solution:

The graph shows a function with a vertical asymptote at x=0 and a horizontal asymptote at y=0. It has a hollow circle at (0, 4), indicating that the function is not defined at that point. The function decreases as x approaches 0 from the left and increases as x approaches 0 from the right.

Answer: The graph of the function is shown above.