Answer:
0
Explanation:
The slope formula is ...
m = (y2 -y1)/(x2 -x1)
Filling in the given point values, we find the slope to be ...
m = (-4 -(-4))/(9 -5) = 0/4 = 0
The slope is 0.
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The y-values are the same at -4, the equation of the line is y = -4. It is a horizontal line with zero slope.