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What is a coordinate grid?

By Ryan McGuire on the 10th of January, 2013

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    What is a coordinate grid?

    Coordinate graphing sounds very dramatic but it is actually just a visual method for showing relationships between numbers. The relationships are shown on a coordinate grid. A coordinate grid has two perpendicular lines, or axes, labeled like number lines. The horizontal axis is called the x-axis. The vertical axis is called the y-axis. The point where the x-axis and y-axis intersect is called the origin.

    The numbers on a coordinate grid are used to locate points. Each point can be identified by an ordered pair of numbers; that is, a number on the x-axis called an x-coordinate, and a number on the y-axis called a y-coordinate. Ordered pairs are written in parentheses (x-coordinate, y-coordinate). The origin is located at (0,0). Note that there is no space after the comma.

    Example:

    The location of (2,5) is shown on the coordinate grid below. The x-coordinate is 2. The y-coordinate is 5. To locate (2,5), move 2 units to the right on the x-axis and 5 units up on the y-axis.

    Grid

     

    Refine By Bridget Gaskin on the 17th of January, 2013

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    A coordinate grid is two dimensional grid that you plot points on using a a virtical and horizontal axies. 

    A location can be ploted on the grid by calculating the distance between the virtical and horizontal lines. 

    Refine By Jonathan on the 14th of January, 2013

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    Bobby used one- third of his car's total petrol caictpay when he went out for a drive. The car tank was holding 30 litres of petrol before the drive, which was 75 litres less than the total caictpay. How much petrol was left after the drive?

    Refine By AMRITA CHAKRAVARTY on the 21st of January, 2013

Suggested reading…

Understand and use coordinates in three dimensions

Understand coordinates in 3D

From year 7 you should have been introduced to the ‘Cartesian Coordinate System’, where you have an x-axis and y-axis, you plot a point with an x, and then label the point (3, 5), meaning 3 along the x-axis, and 5 up the y-axis. 

We live in a 3D universe, so it's possible to add a third axis to this, the z-axis. If the x-axis and y-axis are horizontal and vertical on paper, then the z-axis is used to say how far ‘into or out of the paper’ the coordinate is.

The axis is sometimes drawn in a few difference ways, but it's just looking at the same graph from different points.

In each case, you read the position of coordinates the same way, and the coordinate position is always written (x, y, z)

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