SOLUTION: Okay so my problem is to find the line that passes through (1,4) and (r,5) but my M = undefined. What in the world do I do.

Question 670771: Okay so my problem is to find the line that passes through (1,4) and (r,5) but my M = undefined. What in the world do I do.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
If the slope m is undefined, then only one thing is possible: you are dividing by zero.

The only way this can happen is if x2 - x1 = 0

So...

r - 1 = 0

r = 1

The equation of this line is then x = 1 since this is a vertical line (with undefined slope) that goes through both (1, 4) and (1,5)
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