SOLUTION: (6, -42) and (-4, -2) Write your equation in the form y =

Algebra ->  Linear-equations -> SOLUTION: (6, -42) and (-4, -2) Write your equation in the form y =      Log On


   

Question 1176733: (6, -42) and (-4, -2)
Write your equation in the form y =
Found 2 solutions by MathLover1, josgarithmetic:
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
(6, -42) and (-4, -2) are two points that lie on same line
an equation is
y+=mx%2Bb where m is a slope and b is y-intercept
first use given points to find a slope
m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29
m=%28-2-%28-42%29%29%2F%28-4-6%29
m=%28-2%2B42%29%2F%28-10%29
m=-40%2F10
m=-4

so far equation is
y+=-4x%2Bb.........use one point to find b
-2+=-4%28-4%29%2Bb
-2+=16%2Bb
-2+-16=b
b=-18

and, equation is
y+=-4x-18








Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Formula for slope , assuming your points are for a line,
%28-2-%28-42%29%29%2F%28-4-6%29=%28y-%28-2%29%29%2F%28x-%28-4%29%29
Simplify this and solve for y in terms of x. Finish in form y=mx+b.