Hi,

Using the standard slope-intercept form for an equation of a line y = mx + b

  where m is the slope and b the y-intercept.

line passing through the points:  

(8, -6), 

(4, -2)  m = -4/4 = -1     

Line

 y = (-1)x + b

 -2 = (-1)·4 + b   |Using ordered pair (x,y):(4,-2)  to solve for b

 2 = b

 y = -x + 2 

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