SOLUTION: Find the slope of the line passing through the points (1, 3) and (1, –1). –4 0 Undefined 1

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Question 109409: Find the slope of the line passing through the points (1, 3) and (1, –1).
–4
0
Undefined
1

Found 2 solutions by jim_thompson5910, parth603:
Answer by jim_thompson5910(21685) About Me  (Show Source):
You can put this solution on YOUR website!
Solved by pluggable solver: Finding the slope
To find the slope going from (1,3) to (1,-1) we are going to calculate the change in y over the change in x, or the rise over the run. The change is the difference between the two coordinates. So if the y-coordinate of a point goes from 3 to -1, the change in these numbers is -4 (since -1-3=-4). If the x-coordinate changes from 1 to 1, then the change is 0 (since 1-1=0). So to calculate the slope we use this formula:
Slope:

m=%28change_in_y%29%2F%28change_in_x%29=rise%2Frun where m is the slope

So now we let y%5B2%5D=-1,y%5B1%5D=3,x%5B2%5D=1,x%5B1%5D=1Now plug these numbers into the slope formula:

m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29=%28-1-%283%29%29%2F%281-%281%29%29+=+-4%2F0Since the two points have the same x-coordinate, we have a denominator of zero. Remember we cannot divide by zero. In other words, this is not possible: x%2F0 (we cannot divide any number by 0) This means the slope is undefined, and because we don't have any change in x, we have a vertical line at x=1

Answer by parth603(1) About Me  (Show Source):
You can put this solution on YOUR website!
see we have to find the slope of (1,3) and (1,-1)
formula: m(slope) = (y2-y1)/(x2-x1)
= (-1-3)/(1-1)
= -4/0
so -4/0 is the slope