Given:-
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The slope of the line that passes through the points (6, -8) and (6, -3)
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[tex] \rm \: Let's \: x_1 = 6 , \: y_1= -8 \: and \: \: x_2 = 6 , \: y_2 = -3 [/tex]
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[tex] = \sf \large \frac{(y_2 - y_1 )}{(x_2 - x_1) } [/tex]
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[tex] \sf \large \: = \frac{ -3 \: + \:8}{6 \: - \:6} [/tex]
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[tex] \sf \large = \frac{ - 5}{0} [/tex]
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[tex] \sf \large = \infty [/tex]
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Slop is undefined
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Hope Helps! :)