SOLUTION: I need help in solving this problem: Find the slope of the line passing through (4, 8) and 4, -11). I used to m= y2-y1/x2-x1 to solve the equation -11-8/4-4=-19/0 My fi

Algebra ->  Graphs -> SOLUTION: I need help in solving this problem: Find the slope of the line passing through (4, 8) and 4, -11). I used to m= y2-y1/x2-x1 to solve the equation -11-8/4-4=-19/0 My fi      Log On


   

Question 732330: I need help in solving this problem:
Find the slope of the line passing through (4, 8) and 4, -11).
I used to m= y2-y1/x2-x1 to solve the equation
-11-8/4-4=-19/0
My final answer is -19/0 and Undefined. Is this right?
Found 2 solutions by lynnlo, Edwin McCravy:
Answer by lynnlo(4176) About Me  (Show Source):
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
That's correct, and that means it's a vertical line, which is "infinitely
steep", thus we say its slope is undefined.  Its equation is 

          x = 4,

because that's what is true about every point on that line.  Every point 
on that vertical line has an x coordinate of 4, like the two given points have,
(4, 8) and (4, -11).



Edwin