Date: Wed, 18 Aug 1999 01:41:10 -0400
Why is the slope of a line is designated by the letter "m"?
We have received this question a number of times and the answer is that I don't know. You can find a longer version of the same answer on a site maintained by Jeff Miller called the "Earliest Uses of Various Mathematical Symbols". The URL is http://members.aol.com/jeff570/mathsym.html
Look under the heading "Symbols used in geometry".
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