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document.write( "Instead of doing yours for you, I'll do one exactly like yours step by step, so\r\n" );
document.write( "you can use it as a model to do yours by. Here is the problem I will do.\r\n" );
document.write( "Just use your numbers instead of the ones here:\r\n" );
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document.write( "What is the equation of the ellipse having major axis of length 16, center at\r\n" );
document.write( "(-3,-8), and a focus at (4,-8)?\r\n" );
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document.write( "The equation of an ellipse with major axis horizontal is\r\n" );
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document.write( "where the center is (h,k) = (-3,-8), and where \"a\" = semi-major axis length.\r\n" );
document.write( "The major axis is 16, so the semi-major axis = 8. So far we have\r\n" );
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document.write( "We need \"b\", which is the semi-minor axis length. We have to use the\r\n" );
document.write( "Pythagorean theorem relationship for all ellipses, which is\r\n" );
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document.write( "where c = distance from center to a focus. The distance from the center (-3,-8)\r\n" );
document.write( "to the focus, which is (4,-8) is 7 units, found by counting units on the graph\r\n" );
document.write( "above. So b = 7, and the complete equation of the ellipse is\r\n" );
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document.write( "Now do yours exactly, step by step, like this one.\r\n" );
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document.write( "Edwin
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document.write( "![\"\"](\"/images/stars/stars-13.gif\")
