Answer :
Answer is slope m= undefined
Step-by-step explanation:
Given points are (-1,2) and (-1,9)
[tex]we \: know \: that \: \\ slope = \frac{y2 - y1}{x2 - x1} \\ here \: x1 = - 1 \: \: \: x2 = - 1 \\ y1 = 2 \: \: y2 = 9 \\ on \: substituting \: the \: values \: \\ = \frac{9 - 2}{ - 1 - ( - 1)} \\ = \frac{7}{ - 1 + 1} \\ = \frac{7}{0} \\ = \infty \\ hence \: the \: slope \: is \: undefined[/tex]
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