# Algebra II/Asymptotes

**Rational Functions** have vertical and horizontal "imaginary lines where a graph come close to but doesn't usually make contact or cross it" [aka] **asymptotes**. A **vertical asymptote** occur when x-values are undefined because they make the denominator equal to zero (`0`

). In order to find the vertical asymptote, you must:

**Factor**the denominator (if possible).- Set each factor to
`0`

. - Solve

`X = #`

will be the line of the vertical asymptote, represented as a vertical line. There may be one or more of these vertical asymptotes depending on the equation you're given.