An x-axis is one of the axes of a two- or three-dimensional graph. The x-axis is the horizontal plane of a graph in a Cartesian coordinate system, which gives a numerical value to each point along the horizontal x-axis, as well as the vertical y-axis (in a two-dimensional graph). Students in a variety of academic disciplines—ranging from maths and science to liberal arts—will likely utilize graphs throughout their higher education years.
An x-axis refers to the horizontal plane in a Cartesian coordinate system. A position on a two-dimensional graph can be found by creating perpendicular projections from the x-axis and y-axis. In a two-dimensional system, the first and second coordinates are referred to as the abscissa and the ordinate of P.