Co-ordinates
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Co-ordinates PowerPoint PPT Presentation


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Co-ordinates. Co-ordinates tell us where a point is on a grid. y. First we look at how far ACROSS the grid the point is, this is on the horizontal axis. 4. x. V E R T I C A L. 2 Across. 3. Then we look at how far up the point is, this is on the vertical axis. 2. 4 up. 1. x. 0.

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Co-ordinates

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Co ordinates

Co-ordinates


Co ordinates

Co-ordinates tell us where a point is on a grid.

y

First we look at how far ACROSS the grid the point is, this is on the horizontal axis.

4

x

V

E

R

T

I

C

A

L

2 Across

3

Then we look at how far up the point is, this is on the vertical axis.

2

4 up

1

x

0

1

2

3

4

5

HORIZONTAL


Co ordinates

Co-ordinates tell us where a point is on a grid.

y

We write the numbers with the horizontal number first:

4

x

V

E

R

T

I

C

A

L

2

4

3

,

2

We separate the numbers with a comma.

1

x

0

1

2

3

4

5

HORIZONTAL


Co ordinates

Co-ordinates tell us where a point is on a grid.

y

4

x

V

E

R

T

I

C

A

L

(

2

4

(

3

,

2

We put brackets around the co-ordinates.

1

x

0

1

2

3

4

5

HORIZONTAL


Co ordinates

What are the co-ordinates of these points?

10

x

x

9

x

x

8

V

E

R

T

I

C

A

L

7

6

x

5

x

x

4

x

3

2

x

x

1

0

0

1

2

3

4

5

6

7

8

9

10

HORIZONTAL


Co ordinates

So far we have looked at

co-ordinates in one quadrant

5

4

3

2

1

0

1

2

3

4

5


Co ordinates

We can also have co-ordinates

in more than one quadrant

5

4

3

2

1

0

1

2

3

4

5


Co ordinates

We have to extend our axis

to fit the extra quadrants

5

4

3

2

1

0

1

2

3

4

5


Co ordinates

We now have to number our axis

Because they go past 0 they are negative numbers

5

4

3

2

1

-5

-4

-3

-2

-1

0

1

2

3

4

5

-1

-2

-3

-4

-5


Co ordinates

We still use the same rule:

across first then up

5

4

x

3

2

1

-5

-4

-3

-2

-1

0

1

2

3

4

5

-1

-2

-3

-4

-5


Co ordinates

The x is at -2 on the horizontal axis

and at 3 on the vertical axis

5

4

(

-2

3

)

,

x

3

2

1

-5

-4

-3

-2

-1

0

1

2

3

4

5

-1

-2

-3

-4

-5


Co ordinates

This x is at 4 on the horizontal axis

and -3 on the vertical axis

5

4

(

-2

3

)

,

x

3

2

1

-5

-4

-3

-2

-1

0

1

2

3

4

5

-1

-2

(

)

4

-3

x

-3

,

-4

-5


Co ordinates

This x is at -5 on the horizontal axis

and -2 on the vertical axis

5

4

(

-2

3

)

,

x

3

2

1

-5

-4

-3

-2

-1

0

1

2

3

4

5

-1

(

-5

-2

)

x

-2

(

)

4

-3

,

x

-3

,

-4

-5


Co ordinates

What are the co-ordinates

of these points?

5

x

4

x

3

2

x

x

1

-5

-4

-3

-2

-1

0

1

2

3

4

5

-1

x

-2

x

x

-3

x

-4

-5


Co ordinates

Well done!


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