A line of two lines together and cut together at the Center by a horizontal number line number line X axis is represented by the vertical axis of the plane represented by the Y coordinate plane called the scene.
The two lines perpendicular to each other and intersect at the center line of the horizontal X-axis represents the number of vertical lines represented by the Y-axis planes that. Cartesian plane
Straight line, two lines perpendicular to each other and intersect at point zero the number line horizontal instead of vertical axis X with straight line represented by Y axis. Call this plane, plane coordinates the scene.