In the math problem (figure and position), it is horizontal first and then vertical, which is the content of the sixth grade of primary school. For example, (4,5) is the fourth row and the fifth column, while (9,3) is the ninth row and the third column.

There are also many examples in the picture below.

Extended data

One of the key points of this part is the coordinate axis, which will be often used in future study. The following is the definition of axis:

1. A set of straight lines or curves used to define the coordinate system; The position of a point on the coordinate axis is uniquely determined by a coordinate value, while the positions of points on other coordinate axes are uniquely determined by a coordinate value, and the values of other coordinates on this axis are zero.

2. Two intersecting lines used as reference lines in plane analytic geometry.

3. Three straight lines with a common point are the intersection lines of three reference coordinate planes in three-dimensional analytic geometry. ?

X-axis and Y-axis in the coordinate axis: lines defining the drawing area of the chart are used as the reference system for measurement; The x axis is usually horizontal and contains classification, and the y axis is usually vertical and contains data.

Reference axis Baidu encyclopedia