Question 168224
The line equation is:
Y=mX+b where X & Y are a set of points, m=the slope of the line & b=the Y intercept.
Example:
y=2x-6
{{{ graph( 300, 200, -6, 5, -10, 10, 2x -6) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, 2x -6). 
Here we have X & Y points (3,0) & (0,-6).