SOLUTION: Find a formula for the linear equation graphed below. (4,8) (12,4) (17,1.5)

Algebra ->  Rational-functions -> SOLUTION: Find a formula for the linear equation graphed below. (4,8) (12,4) (17,1.5)      Log On


   

Question 987079: Find a formula for the linear equation graphed below.
(4,8)
(12,4)
(17,1.5)
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Are these three points collinear?
%288-4%29%2F%284-12%29=%284-1.5%29%2F%2812-17%29
4%2F%28-8%29=2.5%2F%28-5%29
-1%2F2=-1%2F2
Yes, common slope using these points.

Pick any of the three points and use now known slope, and fill-in the point-slope form equation. Do whatever you want with it.

y-4=-%281%2F2%29%28x-12%29