The notation "(x, 0)" represents a point in a two-dimensional coordinate system, commonly known as the Cartesian plane. In this system, the first value, "x," indicates the horizontal position, while the second value, "0," signifies the vertical position. This means that the point lies directly on the horizontal axis, also called the x-axis, at the position defined by "x." For example, if "x" is 3, the point would be (3, 0), which is three units to the right of the origin, where the coordinates are (0, 0). Points like these are essential in mathematics and are used in various fields, including geometry, physics, and engineering.