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I need to find the slope, if it exists, for x=6

I need to see if there is a slope for this problem: x=6

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Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
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Hi Nathan;
Slope is defined as change-of-y divided by change-of-x.
(y-y1)/(x-x1)
This is a vertical line.  There is no change of x.  Because a denominator cannot be zero, the
slope is undefined.