Question

The locus of a point $P(x,y,z)$ which moves in such a way that $z=a$ and $y=b$, is a

• A. plane parallel to xy- plane
• B. line parallel to x- axis
• C. line parallel to y- axis
• D. line parallel to z- axis

Answer 1

The correct option is B line parallel to x- axis

We know that, equation of the x-axis is$:y=b,z=a$

So, the locus of the point is equation of x-axis.

Thus line parallel to x axis