What is X-axis?

The X-axis is one of the two axes on a two-dimensional graph. It is usually horizontal and is used to represent the independent variable, which is the data being plotted on the graph. The X-axis is typically used to plot values along the horizontal direction, and the values along the X-axis are usually represented as points, lines, or bars. The X-axis is typically labeled with units of measurement or a description of the data being plotted.