Question 427439
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
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.  
Using the point-slope formula, {{{m =(y[2] - y[1])/(x[2] - x[1])}}}
(2, -9) and 
(4, 1)   m = -10/-2 = 5
 y = 5x + b
 1 = 5*4 + b
-19 = b
 y = 5x-19