Trouble Figuring out what object this this

[Spectre32]

This is the equation they give me:

(y^2/9)+(z^2/25)-x=0 There doing like Ellipsoids and Cones .. things with one and two sheets :surprised. I havn't been able to pinpoint what kind of object this is. Any help would be appericated.

[Claude Bile]

Put x on the right hand side of the equation. Notice that for a given value of x, the equation describes an ellipse.

Claude.