document.write( "Question 454379: Find an eaution of the line containing the given pair of points.
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Algebra.Com's Answer #853389 by ikleyn(53547)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "        The solution in the post by @mananth is incorrect both technically and methodologically.\r
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document.write( "First find the slope of the line  \r\n" );
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document.write( "    m = \"%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\" = \"%28-8+-+%28-9%29%29%2F%28-4+-+%28-7%29%29\" = \"%28-8%2B9%29%2F%28-4%2B7%29\" = \"1%2F3\".\r\n" );
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document.write( "Notice that  \"-1%2F3\"  is not -0.33,  as @mananth mistakenly states and uses.\r\n" );
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document.write( "Plug the value of the slope and the values of the coordinates (-7,-9) of the given point  \r\n" );
document.write( "in the point-slope equation of the line \r\n" );
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document.write( "    y = mx + b,\r\n" );
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document.write( "    -9 = \"%281%2F3%29%2A%28-7%29\" + b,\r\n" );
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document.write( "    b = -9 + \"7%2F3\" = \"%28-27%2B7%29%2F3\" = \"-20%2F3\" = -6\"2%2F3\".\r\n" );
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document.write( "So, an equation is\r\n" );
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document.write( "    y = \"%281%2F3%29x\" - 6\"2%2F3\".\r\n" );
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document.write( "It is the slope-intercept form equation.\r\n" );
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document.write( "Notice that it is absolutely different from that in the post by @mananth.\r\n" );
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