Generally speaking, in the teaching of "plane Cartesian coordinate system", we use the method of points on the number axis to find the coordinates of points in the plane Cartesian coordinate system, which embodies the relationship between ordered number pairs of points in the plane Cartesian coordinate system. This process can cultivate mathematical ideas such as analogy, transformation and mathematical combination.
Plane rectangular coordinate system is a bridge between number and shape, which embodies the mutual transformation between algebraic problems and geometric problems, and is the basis of related knowledge of function graphics, paving the way for the following content.
Using coordinates to represent geographical position reflects the application of coordinate system in real life, using plane rectangular coordinate system to represent the location of regional places, and cultivating students' one-to-one mathematical thinking by using the relationship between ordered number pairs and points.