Graph the equation. Identify the vertices, co-vertices, and foci of the ellipse. List your vertices, co-vertices. List them from left vertex to the right vertex (or bottom vertex then top vertex). Do the same for the co-vertices and the foci. Note: "Co-vertices" is a name for the vertices at the endpoints of the minor axis. This differentiates them from the "vertices", which shall refer to the endpoints of the major axis.

4x2+81y2=324\displaystyle {4}{x}^{{2}}+{81}{y}^{{2}}={324}

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Clear All Draw: Ellipse


Vertices: and

Co-Vertices: and

Foci:   and  

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