document.write( "Question 55464: write the general equation form of the line which passes through the 2 points: (1,2), (6,7) \n" ); document.write( "
Algebra.Com's Answer #37652 by Edwin McCravy(20056)\"\" \"About 
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write the general equation form of the line \r\n" );
document.write( "which passes through the 2 points: (1,2), (6,7)\r\n" );
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document.write( "You need two formulas:\r\n" );
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document.write( "     y2 - y1\r\n" );
document.write( "m = --------- to find the slope, m, and\r\n" );
document.write( "     x2 - x1\r\n" );
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document.write( "then you substitute the value you get for m, then \r\n" );
document.write( "substitute the values for x1 and y1. Do not\r\n" );
document.write( "substitute anything for x and y.  Just leave them\r\n" );
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document.write( "y - y1 = m(x - x1)\r\n" );
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document.write( "(x1,y1) = (1,2), (x2, y2) = (6,7)\r\n" );
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document.write( "so\r\n" );
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document.write( "     y2 - y1     7 - 2     5\r\n" );
document.write( "m = --------- = ------- = --- = 1\r\n" );
document.write( "     x2 - x1     6 - 1     5\r\n" );
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document.write( "Then \r\n" );
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document.write( "y - y1 = m(x - x1) becomes\r\n" );
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document.write( " y - 2 = 1(x - 1)\r\n" );
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document.write( " y - 2 = x - 1\r\n" );
document.write( "   + 2     + 2\r\n" );
document.write( " -------------\r\n" );
document.write( " y     = x + 1\r\n" );
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document.write( "That's the equation:\r\n" );
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document.write( "     y = x + 1\r\n" );
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document.write( "Edwin
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