A Way to Remember What 'm' and 'b' Mean in Slope-Intercept FormDate: 02/01/2004 at 13:28:19 From: David Subject: Graphing linear equations in slope-intercept form I noticed the questions and comments about why "m" is used for slope. A number of years ago, a teacher at a conference explained that when graphing linear equations in slope-intercept form (y = mx + b), you do the following. Begin by graphing the y-intercept ("b" in the equation means BEGIN). Then move the slope ("m" in the equation means MOVE--rise over run). Date: 02/02/2004 at 10:57:46 From: Doctor Rob Subject: Re: Graphing linear equations in slope-intercept form Thanks for writing to Ask Dr. Math, David! That's a good mnemonic device (or memory trick) for remembering what to do with the m and the b, but it's probably not the origin of the usage. You might want to read the thread in our FAQ that talks about why 'm' is used for slope: Math Terms http://mathforum.org/dr.math/faq/faq.terms.html Thanks for your comment! - Doctor Rob, The Math Forum http://mathforum.org/dr.math/ |
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