Coordinate plane is used for plotting points, like a fancier version of a number line.
To plot a point on the coordinate plane, do this:
Always start at the point where both lines meet
Look at the first coordinate and move that many spaces to the right
Look at the second coordinate, and move that many spaces up
Coordinate graphs can be used as maps. You use the same rules to plot points or identify their coordinates, but each point represents a location.