Coordinates tell us where a point is on a grid 0 4 3 2 1 5 4 3 2 1 x y x First we look at how far ACROSS the grid the point is this is on the horizontal axis 2 Across Then we look at how far up the point is this is on the vertical axis ID: 248939
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Slide1
Co-ordinatesSlide2
Co-ordinates tell us where a point is on a grid.
0
4
3
2
1
5
4
3
2
1
x
y
x
First we look at how far ACROSS the grid the point is, this is on the horizontal axis.
2 Across
Then we look at how far up the point is, this is on the vertical axis.
4 up
HORIZONTAL
V
E
R
T
I
C
A
LSlide3
Co-ordinates tell us where a point is on a grid.
0
4
3
2
1
5
4
3
2
1
x
y
x
We write the numbers with the horizontal number first:
2
4
We separate the numbers with a comma.
,
HORIZONTAL
V
E
R
T
I
C
A
LSlide4
Co-ordinates tell us where a point is on a grid.
0
4
3
2
1
5
4
3
2
1
x
y
x
2
4
We put brackets around the co-ordinates.
,
(
(
V
E
R
T
I
C
A
L
HORIZONTALSlide5
3
10
9
8
7
6
2
5
4
3
1
2
1
0
0
6
5
4
9
8
7
10
What are the co-ordinates of these points?
x
x
x
x
x
x
x
x
x
x
V
E
R
T
I
C
A
L
HORIZONTALSlide6
So far we have looked at
co-ordinates in one quadrant
0
5
4
3
2
1
1
2
3
4
5Slide7
We can also have co-ordinates
in more than one quadrant
0
5
4
3
2
1
1
2
3
4
5Slide8
We have to extend our axis
to fit the extra quadrants
0
5
4
3
2
1
1
2
3
4
5Slide9
We now have to number our axis
Because they go past 0 they are negative numbers
0
5
4
3
2
1
1
2
3
4
5
-1
-4
-5
-5
-3
-4
-2
-3
-1
-2Slide10
We still use the same rule:
across first then up
0
5
4
3
2
1
1
2
3
4
5
-1
-4
-5
-5
-3
-4
-2
-3
-1
-2
xSlide11
The x is at -2 on the horizontal axis
and at 3 on the vertical axis
0
5
4
3
2
1
1
2
3
4
5
-1
-4
-5
-5
-3
-4
-2
-3
-1
-2
x
-2
3
,
(
)Slide12
0
5
4
3
2
1
1
2
3
4
5
-1
-4
-5
-5
-3
-4
-2
-3
-1
-2
x
-2
3
,
(
)
x
This x is at 4 on the horizontal axis
and -3 on the vertical axis
4
-3
,
(
)Slide13
0
5
4
3
2
1
1
2
3
4
5
-1
-4
-5
-5
-3
-4
-2
-3
-1
-2
x
-2
3
,
(
)
x
This x is at -5 on the horizontal axis
and -2 on the vertical axis
4
-3
,
(
)
x
-5
-2
,
(
)Slide14
0
5
4
3
2
1
1
2
3
4
5
-1
-4
-5
-5
-3
-4
-2
-3
-1
-2
x
x
x
x
x
x
x
x
What are the co-ordinates
of these points?Slide15
Well done!