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Coordinate grid and ordered pairs

The coordinates of a point in the
coordinate grid are (.v, y), where .v is the
.v-coordinate and _v is the v-coordinate. (n
■, 3)
The axes intersect at right angles at the ' \ 1 •i)
origin (0, 0). -)
The -v-coordinates are written first, 1
(-3, 0) (2 0)
followed by the v-coordinates.
-
6 5 - 4 - 3 2 1 0 1 > 1 ■
-
-
The-V-coordinate tells you how far right -1
(■!■) or left (-) a point is. _■?
(2, -2)
The y-coordinate tells you how far up 1-2 -3
(+) or down {-) a point is. -A
-S
-6

Lines parallel to the x-axis or y-axis

• Some line graphs can be vertical, like
the green graph shown here. i
It is parallel to the v-axis.
All the coordinates have the same value P irall ;l to the v-ax s
fory, so the line is named after its
y value.

1
• Some line graphs can be horizontal, like
the red graph shown here. 6 5 4 3 - 2 i 0 > ; (

-
-
-
-
It is parallel to the.v-axis. -1
pa alle to -?
All the coordinates have the same value thi ?y-a (is
for.v, so the line is named after its -3
-V value. -4
a- = 4
-6

UNIT 11 I Coordinate Geometry and Graphs