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Graphs and the Coordinate Plain Miss Hudson’s Maths

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Using the Rule In the tables that we have been looking at we have been given an x column and a y column, eg. The rule for this table would be: y = 2 x + 2 We can use these values to form a graph. xy 14 26 38 410 Miss Hudson’s Maths

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The Coordinate Plain The Coordinate Plain is what we call the two axis we use in graphing. Miss Hudson’s Maths

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Reading the Coordinate Plain When reading the coordinate plain we read across and then down. The axis going across (horizontal) is the x axis and the axis going down (vertical) is the y axis. This makes sense when we look at the tables because the x value is always in the left hand column and the y value is always in the right. Miss Hudson’s Maths

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xy 14 26 38 410 Miss Hudson’s Maths

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The Coordinate Plain There are four different quadrants in a coordinate plain. These are: Quaadrant 1 Quadrant 3 Quadrant 2 Quadrant 4 Always remember that the quadrant numbers go anti clockwise around the coordinate plain Miss Hudson’s Maths

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Writing Coordinates When writing coordinates they are always in the form of (x,y). If looking at the previous table the coordinates could be written as (1, 4), (2, 6), (3, 8) and (4, 10). This means that you put your first dot at across 1 and up 4, your second dot at across 2 and up 6, your third dot at across 3 and up 8 and your last dot at across 4 and up 10. Once all of these dots are on the coordinate plain the dots can be joined up to form a line. Miss Hudson’s Maths

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This would look like: Miss Hudson’s Maths

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Have a go Write down the coordinates of the following shapes. Miss Hudson’s Maths

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Try these ones Write down the coordinates for the following shapes Miss Hudson’s Maths

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Putting coordinates on a graph One the graph paper provided put the coordinates on the graph. Miss Hudson’s Maths

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1 Plotting Points --- In the Cartesian plane This material is the property of the AR Dept. of Education. It may be used and reproduced for non-profit,

1 Plotting Points --- In the Cartesian plane This material is the property of the AR Dept. of Education. It may be used and reproduced for non-profit,

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