Answer
See the explanation
Work Step by Step
The vertical asymptote of a function $y = f(x)$ is a vertical line $x = k$ when $y\rightarrow\infty$ or $y\rightarrow -\infty$.
Vertical Asymptotes From Graph
By seeing the above examples, you might have already got an idea of determining the vertical asymptotes from a graph. If a part of the graph is turning to be vertical, then there might probably be a VA along that vertical line. The value of the function becomes $\infty$ or $-\infty$ at the value of $x$ along which you found the VA. But note that a vertical asymptote should never touch the graph.
Vertical Asymptotes of Rational Function
We do not need to use the concept of limits (which is a little difficult) to find the vertical asymptotes of a rational function. Instead, use the following steps:
Step 1: Simplify the rational function. i.e., Factor the numerator and denominator of the rational function and cancel the common factors.
Step 2: Set the denominator of the simplified rational function to zero and solve.
