Which of the following best describes an asymptote in the context of rational functions?

Identify the location of the hole in the function f(x) = (x^2 - 1)/(x - 1).

Consider the given rational function and find its domain. 

f(x) = 7x²/(x -8)(x +2)

Identify which of the following rational functions has no vertical asymptotes.

For the following function, write the equations for the vertical, horizontal or oblique asymptotes.

f(x) = (x² - 5x - 13)/(4x² - x - 18)