Question 632080
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
line passing through Pt(1,-3) and having the given slope{{{ m = -5/2}}} 
{{{ m = -5/2}}} tells us that as x decreases by 2, y increases by 5, for ex
(1,-3)
(-1,2)    | x decreases by 2, y increases by 5
(-3,7 )   | x decreases by 2, y increases by 5
plotting these 3 points and connecting with a line, 
one can see line crosses y-axis at y = -1/2  (the y-intercept)
slope intercept form:  y = mx + b   is y = (-5/2)x - 1/2
{{{drawing(300,300,   -6, 6, -6, 8,   grid(1),
circle(1, -3,0.2),
circle(-1, 2,0.2),
circle(-3, 7,0.2),
circle(0, -.5,0.2),
graph( 300, 300, -6, 6, -6, 8,0,-2.5x - .5))}}}