Answer:
It is undefined
Explanation:
The points both go in a vertical direction.
Infinity
Slope = y2 - y1/x2 - x1
Given
x1 = 9
y1 = -3
x2 = 9
y2 = -8
Therefore
Slope = -8 -(-3) /9 - 9
= -8 + 3 /9 - 9
= -5/0
= infinity
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