You can
put this solution on YOUR website!Use this solver.
http://www.algebra.com/tutors/calculating_slope.solver?content_action=show_dev
Plug in the 2 points (

,

) and (

,

) and it will use the slope formula to explain how it got the answer. It will not only give you the slope (in m= form) but it will give you the equation of the line also.