\r\n" );
document.write( "write an equation for the hyperbola:\r\n" );
document.write( "vertices (-7,0) and (7,0), conjugate axis of length 10.\r\n" );
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document.write( "The hyperbola has its center at the origin because the\r\n" );
document.write( "center is halfway between the vertices and the origin\r\n" );
document.write( "is halfway between the vertices.\r\n" );
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document.write( "The equation of a hyperbola which opens right and left is\r\n" );
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document.write( " 
\r\n" );
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document.write( "where a = half the length of the transverse axis\r\n" );
document.write( "(the transverse axis is the line between the vertices)\r\n" );
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document.write( "and\r\n" );
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document.write( "b = half the length of the conjugate axis\r\n" );
document.write( "(the conjugate axis is a line perpendicular to the\r\n" );
document.write( "transverse axis at the center, half of which is \r\n" );
document.write( "above the center and half below.\r\n" );
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document.write( "So since the vertices are (-7,0) and (7,0) the major\r\n" );
document.write( "axis is 14 and half that is 7, so a = 7\r\n" );
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document.write( "Half the conjugate axis is half of 10, or 5. So b = 5.\r\n" );
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document.write( "So the equation is:\r\n" );
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document.write( " 
\r\n" );
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document.write( "or\r\n" );
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document.write( " 
\r\n" );
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document.write( "If you want to see it graphed with the defining\r\n" );
document.write( "rectangle and asymptotes, post again.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
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document.write( "![\"\"](\"/images/stars/stars-13.gif\")
