Describe the plane perpendicular to each of the following axes at the given points with a single equation or a pair of equations.
a. the z-axis at (6, -8, -8)
b. the x-axis at (8, -1, -2)
c. the y-axis at (6, -7, 3)
a. Choose the correct equation of a plane perpendicular to the z-axis.
A. z = -8
B. y = -8
C. x = 6