Equation of ZOX plane is y = 0
Direction ratio of normal to this plane is (0,1,0)
since the required plane is parallel to y = 0
Direction ratio of its normal is also (0,1,0). Intercepts on y-axis is 3,
∴ The point (0, 3, 0) **** on the plane.
∴ equation of plane
(x – 0) + 1 (y – 3) + 0 (z – 0) = 0
∴ y = 3.
