SOLUTION: please help me solve this proof The formula learned for slope is m= y2-y1/x2-x1. use an algebraic proof to show that the slope can be claculated using the equation m= y1-y2/x1-x2

Algebra ->  Algebra  -> Geometry-proofs -> SOLUTION: please help me solve this proof The formula learned for slope is m= y2-y1/x2-x1. use an algebraic proof to show that the slope can be claculated using the equation m= y1-y2/x1-x2      Log On

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Question 234739: please help me solve this proof
The formula learned for slope is m= y2-y1/x2-x1. use an algebraic proof to show that the slope can be claculated using the equation m= y1-y2/x1-x2
Answer by Alan3354(21550) About Me  (Show Source):
You can put this solution on YOUR website!
The formula learned for slope is m= y2-y1/x2-x1. use an algebraic proof to show that the slope can be claculated using the equation m= y1-y2/x1-x2
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y1-y2 = -(y2-y1)
Same with the x terms
It's both NUM and DEN times -1, which is no change.