1. Introduction to Coordinate Grid

2. 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

3. Axes
The horizontal and vertical lines on a coordinate grid have special names
The horizontal line is called the x axis
The vertical line is called the y axis

4. 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)
IT IS IMPORTANT TO REMEMBER THAT X IS ALWAYS FIRST!

5. Plotting Points
When we locate a point on a grid it is called plotting a point.
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