Introduction to
Coordinate Grid
Coordinate Grid
 Coordinate grid: (a.k.a. coordinate plane or
Cartesian plane)
 A grid with a horizontal and vertical line both
in numbered order starting at 0
Axes
 The horizontal and vertical lines on a
coordinate grid have special names
 The
 The
is called the x axis
is called the y axis
Ordered Pairs
 Ordered Pair: a pair of numbers that
describes a point on a coordinate grid
 Write ordered pairs with the x (horizontal)
coordinate first and the y (vertical)
coordinate second

(x, y) = (horizontal, vertical)

Ex: (3, 5) means right 3, up 5

Origin: the point where the x and y axes
meet; the point (0,0)
Plotting Points
 When we locate a point on a grid it is called
.
 Ex: 1) Plot the point (7, 3) on the grid

2) Plot the point (1, 9) on the grid

3) Plot the point (4, 8) on the grid

4) Plot the point (6, 0) on the grid