It is not difficult to connect x y with the plane rectangular coordinate system by using the mathematics of what X Y means. In this coordinate system, X and Y represent positions or distances in the horizontal and vertical directions, respectively. The intersection of the X axis and the Y axis is called the origin, which represents the position when all coordinate values are zero. In mathematical problems, we can use coordinate system to describe various forms of functions, such as linear function, quadratic function, cubic function and their images and properties.

On the other hand, x and y can also represent the relationship between two variables. For example, in algebra, when we encounter an equation with two unknowns, we usually express one of the variables as X and the other as Y, and then calculate the relationship between them through the equation. In the field of probability statistics and data analysis, X and Y can represent the correlation and dependence between two variables. We can put the data points on the coordinate system and describe the relationship between them by linear regression and other methods.

Finally, x y has a special meaning. In the figure, x stands for horizontal coordinates and y stands for vertical coordinates. The starting point of this representation is the upper left corner and the origin is there. So in cg animation design and game development, x y is often used to represent the position of graphics on the screen. This representation method can conveniently calculate the collision and motion of graphics, and correctly display graphics on screens with different resolutions.