x-axis, y-axis and Coordinates
In this lesson, you’ll see how to describe the position of a point on a grid using a pair of numbers.
In the diagram below there is a numbered horizontal line, called the x-axis.
And a numbered vertical line, called the y-axis.
Using this arrangement we can describe the position of points using coordinates.
What are Coordinates?
The coordinates of a point is a pair of numbers, in brackets, which describe the position of a point.
For example, to find the point (4,7) you would go 4 units to the right of the origin (this is where your two axes meet) and 7 units up.
You can see the point below in red.
Similarly, the point labelled A below will have coordinates (12,1).
The point labelled B below will have coordinates (6,0).
And the point labelled C below will have coordinates (0,8).
Take the Test
Enter coordinates in the correct format, separated by a comma and enclosed by brackets.
Like this: (3,4)
Now give the coordinates of these points:
Key Points of this Lesson:
- The grid used is numbered horizontally (on the x-axis) and also vertically (the y-axis). Where they meet is called the origin
- A point is described by two numbers in brackets called coordinates
- The first coordinate of a point is the number of units to the right of the origin and the second coordinate is the number of units moved upwards