The locus represented by xy + yz = 0 is
A. A pair of perpendicular lines
B. A pair of parallel lines
C. A pair of parallel planes
D. A pair of perpendicular planes
Answer:D
The locus represented by xy + yz = 0 is
A. A pair of perpendicular lines B. A pair of parallel lines C. A pair of parallel planes D. A pair of perpendicular planes