document.write( "Question 42839: what can be said of points with equal abscissa?with equal ordinates?
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Algebra.Com's Answer #27899 by AnlytcPhil(1806) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "what can be said of points with equal abscissa? \r\n" );
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document.write( "\"Abscissa\" is a fancy name for the 1st coordinate,\r\n" );
document.write( "or \"x-coordinate\"\r\n" );
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document.write( "Let's plot some and see.  Below I have plotted (3,7),\r\n" );
document.write( "(3,3), (3,-4) and (3,-8), all having the same \r\n" );
document.write( "abscissa, 3.\r\n" );
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document.write( "Notice that they all lie on the same vertical line.\r\n" );
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document.write( "Incidentally the equation of that vertical line is \r\n" );
document.write( "simply this:  \r\n" );
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document.write( "            x = 3 \r\n" );
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document.write( "with equal ordinates?\r\n" );
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document.write( "\"Ordinate\" is a fancy name for the 2nd coordinate, \r\n" );
document.write( "or \"y-coordinate\"\r\n" );
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document.write( "Let's plot some and see.  Below I have plotted (-6,-4),\r\n" );
document.write( "(3,-4), (4,-4) and (7,-4), all having the same \r\n" );
document.write( "ordinate, -4.\r\n" );
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document.write( "Notice that they all lie on the same horizontal \r\n" );
document.write( "line.\r\n" );
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document.write( "Incidentally the equation of that horizontal line is \r\n" );
document.write( "simply this:  \r\n" );
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document.write( "            y = -4 \r\n" );
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document.write( "Edwin

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