Fill in the blanks

A line is parallel to x-axis if all the points on the line have equal ________.

y and z coordinates.

Explanation:

If a line is parallel to x-axis then every point on it will be at a constant distance from xy and xz plane.

∵ z-coordinate of a point gives its perpendicular distance from xy plane and y-coordinate of a point gives its perpendicular distance from xz plane

∴ every point will have same y and z coordinates.