Question 445954
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
Using the point-slope formula, {{{m =(y[2] - y[1])/(x[2] - x[1])}}}
(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
{{{drawing(300,300, -20, 20, -20, 20,   grid(1),
circle(5, 7,0.6),
circle(8, 1,0.6),

graph(300,300,-20, 20, -20, 20, 0,-2x+ 17))}}}