Introduction to the coordinate plane (video) | Khan Academy
https://www.khanacademy.org/math/cc-fifth-grade-math/imp-geometry-3/imp-intro-to-the-coordinate-plane/v/introduction-to-the-coordinate-plane
WEBEach one is an axis and the one that goes left right here, this is known as the X axis, or it's typically known as the X axis. In the future it might be called other things, and the one that goes up down in the vertical direction, this is typically known as the Y axis.
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