document.write( "Question 983479: Write the equation of an ellipse with vertices at (7, 0) and (-7, 0) and co-vertices at (0, 1) and (0, -1).
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Algebra.Com's Answer #604470 by KMST(5328) $\"\"$ $\"About$

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$\"x%5E2%2F7%5E2%2By%5E2=1\"$ <--> $\"x%5E2%2F49%2By%5E2=1\"$
\n" ); document.write( "If vertices and co-vertices are symmetrical with respect to the origin,
\n" ); document.write( "then the ellipse is centered at the origin.
\n" ); document.write( "The equation of an ellipse centered at the origin is
\n" ); document.write( " $\"x%5E2%2Fa%5E2%2By%5E2%2Fb%5E2=1\"$ .
\n" ); document.write( "When $\"x=0\"$ , $\"y%5E2%2Fb%5E2=1\"$ ---> $\"system%28x=0%2C%22with%22%2Cy=-b%2C%22or%22%2Cy=b%29\"$ are the coordinates of vertices or co-vertices.
\n" ); document.write( "When $\"y=0\"$ , $\"x%5E2%2Fa%5E2=1\"$ ---> $\"system%28y=0%2C%22with%22%2Cx=-a%2C%22or%22%2Cx=a%29\"$ are the coordinates of vertices or co-vertices. \n" ); document.write( "

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