A vertical asymptote is plotted regularly, the graph may never cross through a vertical asymptote. The equation for a vertical asymptote is X= # while a hole is a ordered pair, (x,y). While a graph with a hole is plotted with an open circle rather than a closed circle.A hole may also be found when factors are canceled, the x's must be placed by a zero, and the simplified equation indicates the hole, the graph will not go through the hole but over it.
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