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Q: 2 and -2 are square roots of 4Then why -2 is not used in graph of square root function?
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how many roots does the graphed polynomial function have?

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Can the graph of a rational function have more than one vertical asymptote?

Assume the rational function is in its simplest form (if not, simplify it). If the denominator is a quadratic or of a higher power then it can have more than one roots and each one of these roots will result in a vertical asymptote. So, the graph of a rational function will have as many vertical asymptotes as there are distinct roots in its denominator.


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