The equivalent equation solved for the slope, m is:
[tex]m=\dfrac{y-b}{x}[/tex]
We know that the general equation of a line in slope-intercept form is given by the equation:
[tex]y=mx+b[/tex]
where m is the slope of the line and b is the y-intercept of the line.
Hence, we get:
[tex]mx=y-b[/tex]
( since on subtracting both side of equation (1) by b)
and now on dividing both side of the equation by x we get:
[tex]m=\dfrac{y-b}{x}[/tex]