Answer
Elliptical paraboloid.
See image:
.
Work Step by Step
Comparing to Table 12.1, we recognize the form of an
Elliptical paraboloid, with y and z interchanged.
The axis is the y-axis; y is positive.
The intersections with the planes parallel to the xz-plane are circles.
The intersections with the planes parallel to the xy-plane are parabolas.
The intersections with the planes parallel to the yz-plane are parabolas.