SOLUTION: Find the slope of the line through the pair of points. (-9, -6) and (-9, -8)

Algebra ->  Graphs -> SOLUTION: Find the slope of the line through the pair of points. (-9, -6) and (-9, -8)       Log On


   

Question 40613: Find the slope of the line through the pair of points.

(-9, -6) and (-9, -8)

Answer by junior403(76) About Me  (Show Source):
You can put this solution on YOUR website!
Find the slope of the line through the pair of points.
(-9, -6) and (-9, -8)
When finding the slope of a line (m) passing through 2 points (-9, -6) and (-9, -8) we can use the slope formula.
m=%28y2-y1%29%2F%28x2-x1%29
Lets use point (-9,-6) as (x1,y1) and point(-9,-8) as (x2,y2).
m+=+%28-8-%28-6%29%29%2F%28-9-%28-9%29%29
This means...
m+=+%28-8%2B6%29%2F%28-9%2B9%29
Then perform the indicated operations...
m+=+%28-2%29%2F%280%29
Which is undefined.
The slope formula gives us a fraction that tells us the value of the slope m.
m=rise%2Frun
The rise tells us how a line moves verticaly on a graph, and the run tells us how a line moves horizontaly on the same graph.
So if the rise is -2 and the run is 0 then we know that the line does not move horizontaly, or it is a vertical line.
So the slope is undefined.
I hope this helps.
Good Luck!