document.write( "Question 427399: Find the slope if it exists, of the line containing the pair of points:\r
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Algebra.Com's Answer #297217 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Using the point-slope formula, 
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document.write( "(4, 2) and 
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document.write( "(5, -2)   m = 4/-1 = -4
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document.write( " Always important to watch the signs.
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document.write( "Line  y = -4x  for example slants to the left
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document.write( "Line  y = 4x slants to the right
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