Coordinates
Maths: Year 3 & 4 National Curriculum, topic 7.3.1
Coordinates
Co-ordinates are used to plot the position of points on a graph.
Axes
- On the graph above, there is:
- A horizontal line called the x-axis.
- A vertical line called the y-axis.
Origin
- The axes are numbered to tell you how far along or how far up the axis a point is.
- How far along the x-axis a point is is called the x-coordinate.
- How far up the y-axis a point is is called the y-coordinate.
Coordinates
- We give the location of a point in coordinates (x,y).
- x is the x-coordinate of the point.
- y is the y-coordinate of the point.
- The x-coordinate is always given before the y-coordinate.
Points
- The point on the grid has coordinates (2,1).
- This means the point is 2 along, and 1 up.
- The axes meet at a point called the origin which is at (0,0).
Test yourself on Coordinates
What is the coordinate of the point in the graph shown?
What is the coordinate of the point in the graph shown?
What is the coordinate of the point in the graph shown?