SOLUTION: The points (2, -7) (-2, 1) and (8,K) are all on the same slope. How can I solve for the variable "K"? Thanks for your time and effort! :)

Algebra ->  Linear-equations -> SOLUTION: The points (2, -7) (-2, 1) and (8,K) are all on the same slope. How can I solve for the variable "K"? Thanks for your time and effort! :)      Log On


   



Question 971861: The points (2, -7) (-2, 1) and (8,K) are all on the same slope.
How can I solve for the variable "K"?
Thanks for your time and effort! :)

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
slope for first two is change in y/change in x
8-(-7)/-2-2
8/-4=-2
second and third must have a slope of -2
k-1/8-(-2)
(k-1)/10 equals -2
-20=k-1
k=-19
(8,-19)
first and third should be the same
-19-(-7)/8-2
-12/6 slope is -2
graph%28300%2C300%2C-5%2C8%2C-19%2C5%2C-2x-3%29