You can put this solution on YOUR website! slope = which is the change in y values of two points over the change in the x values of those same two point. Direction is important but it doesnt matter which point you start with and which you end with as long as your consistent in your direction.
example take points (2,5) and point (-3,4)
to find the slope you can start with the first point or the second... I will start with the second point using the y and x values of that point FIRST.
:
(4-5)/(-3-2)=slope=-1/-5=1/5 or you could start with first point
:
(5-4)/(2-(-3))=1/5
either way you end up with the slope but you cannot ever start with the first point on the y such as (5-4) and then change direction such as using the second point first (-3-2)......as you can see that changes the sign to
-1/5...DIRECTION is VERY important
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