Answer:
slope is indeterminate
Explanation:
Given (- 9, 6) and (- 9, 6) ← that is a single point
No line is formed by a point , thus the slope is indeterminate
Well I think It's undefined
m = y2 - y1/x2 - x1
= 6-6/-9-(-9)
= 6-6/-9+9
m = 0/0
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