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W.A.L.T: Reading and W.A.L.T: Reading and Writing Co-ordinatesWriting Co-ordinates
Our AimOur Aim• To locate things using co-ordinate
grids.
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6
1 2 3 4 50 6
DefinitionDefinition• x axis – a horizontal number
line on a coordinate grid.
1 2 3 4 50 6 x
HintHint• x ‘is a cross’
(across )
1 2 3 4 50 6 x
DefinitionDefinition• y axis – a vertical number line
on a coordinate grid.
12345
0
6
y
DefinitionDefinition• Coordinates – an ordered pair
of numbers that give the location of a point on a grid. (3, 4)
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1 2 3 4 50 6
(3,4)
HintHint• The first number is always the x or first letter
in the alphabet. The second number is always the y the second letter in the alphabet.
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(3,4)
How to Plot Ordered PairsHow to Plot Ordered Pairs• Step 1 – Always find the x value
first, moving horizontally.
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(2, 3)
y
x
How to Plot Ordered PairsHow to Plot Ordered Pairs• Step 2 – Starting from your new
position find the y value by moving up.
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1 2 3 4 50 6
(2, 3)(2,3)y
x
How to Find Ordered PairsHow to Find Ordered Pairs• Step 1 – Find how far over horizontally
the point is by counting to the right (positive) or the left (negative).
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6
1 2 3 4 50 6
(5, 4)
y
x
How to Find Ordered PairsHow to Find Ordered Pairs• Step 2 – Now count how far
vertically the point is by counting up (positive) or down (negative).
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6
1 2 3 4 50 6
(5,4)
y
x
What is the ordered pair?What is the ordered pair?
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0
6
1 2 3 4 50 6
(3,5)
y
x
What is the ordered pair?What is the ordered pair?
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0
6
1 2 3 4 50 6
(2,6)
y
x
What is the ordered pair?What is the ordered pair?
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0
6
1 2 3 4 50 6
(4,0)
y
x
What is the ordered pair?What is the ordered pair?
1
32
45
0
6
1 2 3 4 50 6
(0,5)
y
x
What is the ordered pair?What is the ordered pair?
1
32
45
0
6
1 2 3 4 50 6
(1,1)
y
x
Plot This Ordered PairPlot This Ordered Pair
-2
0-1
12
-3
3
-2 -1 0 1 2-3 3
(-1, 2)(-1, 2)
y
x
Plot This Ordered PairPlot This Ordered Pair
-2
0-1
12
-3
3
-2 -1 0 1 2-3 3
(1, -1)(1, -1)
y
x
Plot This Ordered PairPlot This Ordered Pair
-2
0-1
12
-3
3
-2 -1 0 1 2-3 3
(2, -2)(2, -2)
y
x
Plot This Ordered PairPlot This Ordered Pair
-2
0-1
12
-3
3
-2 -1 0 1 2-3 3
(-3, -2)(-3, -2)
y
x
