Describe the traces of the surface in the given planes. See Example 2. y = x2 + 22 (a) xy-plane (b) y = 9 (c) yz-plane Classify the surface. ellipsoid elliptic cone elliptic paraboloid O hyperbolic...

Extracted text: Describe the traces of the surface in the given planes. See Example 2. y = x2 + 22 (a) xy-plane (b) y = 9 (c) yz-plane Classify the surface. ellipsoid elliptic cone elliptic paraboloid O hyperbolic paraboloid hyperboloid of one sheet O hyperboloid of two sheets