SOLUTION: why "m" on y=mx+b?

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Question 27001: why "m" on y=mx+b?
Answer by venugopalramana(3286) About Me  (Show Source):
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IT IS A STANDARD SYMBOL USED TO INDICATE SLOPE OR GRADIENT OF A LINE...THERE IS NO HARD AND FAST RULE ON SYMBOL TO BE USED..IN FACT IN STANDARD LINEAR FORM WE USE AX+BY+C=0...WHERE SLOPE IS -A/B,WHICH WAS REPRESENTED BY M IN Y=MX+C