SOLUTION: find the slope of the line containing the pair of points: (8, 2) and (9, -7)

Algebra ->  Graphs -> SOLUTION: find the slope of the line containing the pair of points: (8, 2) and (9, -7)      Log On


   

Question 423751: find the slope of the line containing the pair of points: (8, 2) and (9, -7)
Found 2 solutions by jim_thompson5910, Adrish:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Note: is the first point . So this means that x%5B1%5D=8 and y%5B1%5D=2.
Also, is the second point . So this means that x%5B2%5D=9 and y%5B2%5D=-7.


m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29 Start with the slope formula.


m=%28-7-2%29%2F%289-8%29 Plug in y%5B2%5D=-7, y%5B1%5D=2, x%5B2%5D=9, and x%5B1%5D=8


m=%28-9%29%2F%289-8%29 Subtract 2 from -7 to get -9


m=%28-9%29%2F%281%29 Subtract 8 from 9 to get 1


m=-9 Reduce


So the slope of the line that goes through the points and is m=-9


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Answer by Adrish(44) About Me  (Show Source):
You can put this solution on YOUR website!
Solutions: When two points (x1, y1) and (x2, y2) is given
Slope(m)= (y2-y1)/(x2-x1)
so, given points are (8,2) and (9,-7)
Slope(m)= (-7-2)/(9-8)
m= -9/1
m=-9