document.write( "Question 674461: Determine whether the equation is a function.\r
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Algebra.Com's Answer #419253 by MathLover1(20850) $\"\"$ $\"About$

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$\"x%5E2-4y%5E2=1\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"graph%28+600%2C+600%2C+-5%2C+5%2C+-5%2C+5%2C+x%5E2-4y%5E2%3E=1+%29\"$ \r
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\n" ); document.write( "\n" ); document.write( "so, your equation is $\"hyperbola\"$ \r
\n" ); document.write( "\n" ); document.write( "the \"basic\" hyperbola $\"y=1%2Fx\"$ $\"is\"$ the function, but not all hyperbolas are functions: \r
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\n" ); document.write( "\n" ); document.write( " $\"+graph%28+600%2C+600%2C+-5%2C+5%2C+-5%2C+5%2C+1%2Fx%29+\"$ \r
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\n" ); document.write( "\n" ); document.write( "the ones that are $\"NOT\"$ functions are in the form of $\"x%5E2%2Fa%5E2+-+y%5E2%2Fb%5E2+=+1\"$ ; whenever $\"y\"$ is $\"squared\"$ , you do $\"not\"$ $\"+have\"$ a $\"functions\"$ \r
\n" ); document.write( "\n" ); document.write( "so, your hyperbola is $\"not\"$ a $\"function\"$ \r
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