document.write( "Question 339982: find the slope of a line (-9,5)and (9,5)m = \n" ); document.write( "
Algebra.Com's Answer #243657 by nyc_function(2741)\"\" \"About 
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Let m = slope\r
\n" ); document.write( "\n" ); document.write( "m = (5 - 5)/(9 -(-9))\r
\n" ); document.write( "\n" ); document.write( "m = 0/(9 + 9)\r
\n" ); document.write( "\n" ); document.write( "m = 0/18\r
\n" ); document.write( "\n" ); document.write( "m = 0\r
\n" ); document.write( "\n" ); document.write( "The slope is zero.\r
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\n" ); document.write( "\n" ); document.write( "The slope of a horizontal line. A horizontal line has slope 0 because all its points have the same y-coordinate.
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