SOLUTION: How do I find the slope of the line passing through points (3,4) and (3,-4)? My solution is 0..am I right?

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Question 80519: How do I find the slope of the line passing through points (3,4) and (3,-4)? My solution is 0..am I right?
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Find the slope of the line passing through the two points: (3, 4) and (3, -4).
The slope, m is given by:
m+=+%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29
In this problem:
x%5B1%5D+=+3
y%5B1%5D+=+4
x%5B2%5D+=+3
y%5B2%5D+=+-4
Making the appropriate substitutions, we get:
m+=+%28-4-4%29%2F%283-3%29
m+=+-8%2F0 Undefined!
The slope is undefined, not 0!
A line with an undefined slope (m = x/0) is a vertical line, which is what you have here.
A line with a zero slope (m = 0) is a horizontal line.