SOLUTION: Which of the following equations describe the line below (4,-4) (1,2) a) y-2=-1/2(x-1) b)y-1=-1/2(x-2) c)y-4=-1/2(x-4) d)y-4=-2(x+4) e)y-1=-2(x-2) f) y-4=-1/2(x+4)

Algebra ->  Linear-equations -> SOLUTION: Which of the following equations describe the line below (4,-4) (1,2) a) y-2=-1/2(x-1) b)y-1=-1/2(x-2) c)y-4=-1/2(x-4) d)y-4=-2(x+4) e)y-1=-2(x-2) f) y-4=-1/2(x+4)      Log On


   

Question 468049: Which of the following equations describe the line below (4,-4) (1,2)
a) y-2=-1/2(x-1)
b)y-1=-1/2(x-2)
c)y-4=-1/2(x-4)
d)y-4=-2(x+4)
e)y-1=-2(x-2)
f) y-4=-1/2(x+4)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Using the point-slope formula, m+=%28y%5B2%5D+-+y%5B1%5D%29%2F%28x%5B2%5D+-+x%5B1%5D%29

(4,-4) 

(1,2)  m = -6/3 = -2

y+-+y%5B1%5D=+m%28x+-+x%5B1%5D%29

  y + 4 =  -2(x-4)   |using Pt(4,-4)

OR

  y - 2 = -2(x - 1)   |using Pt(1,2)