The equation of z-axis in three-dimensional space is _

The equation x^2-x-2=0 in three dimensional space is reresented by (A) a pair of parlle planes (B) as pair of straigh lines (C) a pair of perpendicular planes (D) a set contasining two distinct points

The equation x^2-x-2=0 in three dimensional space is represented by (A) a pair of parallel planes (B) as pair of straight lines (C) a pair of perpendicular planes (D) a set containing two distinct points

The equation xy=0 in three dimensional space is represented by (A) a plane (B) two planes at righat angles (C) a pair of parallel planes (D) a pair of straighat lines

The equation xy=0 in three dimensional space is represented by (A) a plane (B) two planes at righat angles (C) a pair of parallel planes (D) a pair of straighat lines

The equation of x-axis in space are

The graph of the equation x^2+y^2=0 in the three dimensional space is (A) x-axis (B) y-axis (C) z-axis (D) xy-plane

The graph of the equation x^2+y^2=0 in the three dimensional space is (A) x-axis (B) y-axis (C) z-axis (D) xy-plane

The graph of the equation x^2+y^2=0 in the three dimensional space is (A) x-axis (B) y-axis (C) z-axis (D) xy-plane

The equations of x- axis in space are

The equations of y-axis in space are: