You can put this solution on YOUR website! Pick two points:
(x,y)
(x1,y1)
.
m = (y - y1) / (x - x1)
.
Now you're on your way to defining the equation in slope-intercept form: y = mx+b
.
Pick one of your points and substitute for 'x' and 'y' to fine 'b'.
.
And you're done.