The plane passing through the points (1,1,1),(1,–1,1) and (–7,–3,–5) is parallel to
Equation of the plane is
∣∣ ∣∣x−1y−1z−10−20−8−4−6∣∣ ∣∣=0⇒3x−4z+1=0 ∴ It is parallel to y- axis