Hi,

Using the point-slope formula, 

(5,7) and 

(8,1)  m = 6/-3 = -2

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

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

  

 y = -2x + b

 1 = -2*8 + b

 17 = b

 y = -2x + 17



 

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