The term "x축" refers to the horizontal axis in a two-dimensional coordinate system, commonly used in mathematics and graphing. It is typically paired with the vertical axis, known as the "y축." The x축 represents the independent variable, allowing for the plotting of data points along its length. In a graph, each point is defined by its coordinates, which consist of an x-value and a y-value. The x축 helps visualize relationships between variables, making it easier to analyze trends and patterns in data, such as those found in statistics or science.