Final answer:
The equation z = 2 - y² represents a parabolic cylinder in three-dimensional space.
Step-by-step explanation:
The equation z = 2 - y² represents a surface in three-dimensional space.
The equation can be rewritten as z + y² = 2, which describes a parabolic cylinder.
The parabolic cylinder opens upward along the z-axis and has its vertex at the point (0, 0, 2).