Answer:
undefined
Step-by-step explanation:
The slope formula tells you the slope is ...
m = (y2 -y1)/(x2 -x1)
Fill in the point coordinates, we find the slope to be ...
m = (6 -9)/(-5 -(-5)) = -3/0
This slope is undefined.
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It means the line is a vertical line. The constant must match the x-coordinates of the points:
x = -5 . . . . the line through the given points

The answer is above.
Additional note 1:

Additional note 2:
In the answer I filled in "0" at the place where "n" was. This is because the question tells us n=0
It is C..........................Happy Birthday
Answer:
3sqrt(2) ................