Math Open Reference
Math Open Reference: Coordinates of a Point
Learn about the coordinates of a point with this handy reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
Wolfram Research
Wolfram Math World: Y Axis
This is a very brief site giving the name physicists use when referring to this axis, and its general orientation in the Cartesian system.
Interactive Mathematics
Interactive Mathematics: Rectangular Coordinates
Descriptions of x- and y-coordinates are presented, followed by an interactive game that demonstrates how to plot points on the coordinate plane. Examples and exercises are provided for practice.