SOLUTION: Find the slope of a line containing a pair of points (2,1) and (10,-7). I am not good at algebra. Please help!!!!!

Algebra ->  Graphs -> SOLUTION: Find the slope of a line containing a pair of points (2,1) and (10,-7). I am not good at algebra. Please help!!!!!      Log On


   

Question 182083: Find the slope of a line containing a pair of points (2,1) and (10,-7). I am not good at algebra. Please help!!!!!
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Note: is the first point and is the second point .


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


m=%28-7-1%29%2F%2810-2%29 Plug in y%5B2%5D=-7, y%5B1%5D=1, x%5B2%5D=10, and x%5B1%5D=2


m=%28-8%29%2F%2810-2%29 Subtract 1 from -7 to get -8


m=%28-8%29%2F%288%29 Subtract 2 from 10 to get 8


m=-1 Reduce


So the slope of the line that goes through the points and is m=-1