Grade 4 - Progress in Mathematics

Update your skills. See page 23.

Coordinate Geometry

10-11

Name the x- and y-coordinates in

each ordered pair.

1. (4, 2) 2. (5, 1) 3. (3, 0)


2. (1, 1) 5. (2, 3) 6. (0, 4)

A coordinate grid has two axes:

a horizontal axis called the x-axis,

and a vertical axis called the y-axis.

y-axis

origin x-axis

x-coordinate

(x, y)

y-coordinate

1

2

3

5

4

6

1

A

0

2 3 4 5 6

Yo u can use an ordered pair of numbers (x, y) to

locate points on a coordinate grid.

The x-coordinate tells how many spaces

to move horizontally along the x-axis.

The y-coordinate tells how many spaces

to move vertically along the y-axis.

The coordinates of point Aare ( 4 , 2 ).

The point where the x- and y-axes intersect

is called the origin. The coordinates of the

origin are (0, 0).

2.0

8204-6_346-347 10/11/07 3:30 PM Page 346