Question 820476
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Line Passing through 
(1,9) and 
(4,-7)   m = {{{(9-(-7))/(1-4) = 16/-3 }}}    {{{m =(y[2] - y[1])/(x[2] - x[1])}}}   
 y-9 = (-16/3)(x-1)    |point-slope form of the equation 
 y-9 = (-16/3)x + 16/3
  y =  (-16/3)x + 43/3  |slope-intercept form of the equation
{{{drawing(300,300,   -10,10,-10,10,  
 grid(1),
circle(1, 9,0.4),
circle(4, -7,0.4),
graph( 300, 300, -10,10,-10,10,0,(-16/3)x + 43/3
 ))}}}