the plane perpendicular to each of the following axes at the given points with a single equation or a pair of a. the z-axis at (1,-2,3) b. the x-axis at (2, -6, -1) c. the y-axis at (2,4,-4) a. Choose the correct equation of a plane perpendicular to the z-axis. A. x=1 B. y=-2 C. z=3 b. Choose the correct equation of a plane perpendicular to the x-axis. A z=-1 B. x=2 OC y=-6 c. Choose the correct equation of a plane perpendicular to the y-axis OA. y=4 B. x=2