Question 426638
  <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.  
slope-intercept equation for the line with slope 4/5 and y-intercept (0, -1)
  y = (4/5)x - 1
Note: as y increases/decreases by 4, x increases/decreases by 5
{{{drawing(300,300,   -6, 6, -6, 6, grid(1),
circle(0, -1,0.3),
circle(1.25,0,0.3),
graph( 300, 300, -6, 6, -6, 6,0,.8x-1))}}}