Cartesian plane.

Order Pair:

A pair of two real number written in fix order within parenthesis. It represent the position of the point in the cartesian plane.

For Example: $(3,2)$

This is defining the point on $3^{rd}$ row and $2^{nd}$ column or the value of $x$ is $3$ and the value of $y$ is $2$

Real life examples:

If there are 5 columns and 3 rows in a class each student of the class will be recognized with a different order pair.

Such as student G has an order pair of $(2,2)$ because G position is in the second row and second column. as shown in the figure:

Cartesian Plane

• The cartesian coordinate system consist of two real number lines

• The point of intersection of both the number lines in the cartesian coordinate system is called Origin and denoted as O.

• X-axis is the horizontal number line of the cartesian plane.

• Y-axis is the vertical number line of the cartesian plane.