The vertical line is called the y-axis and the horizontal is called the x-axis.
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The coordinate plane is formed by the intersection of a vertical and a horizontal number line. What is the horizontal number line called?
The xy or Cartesian or coordinate plane.
The coordinate plane or grid.
Vertical is the Y-Axis Horizontal is the X-Axis -------------------------------------------------------------------------------------------------------- Vertical is up to down Horizontal is left to right
Another name for a coordinate plane is a Cartesian plane. It is named after the mathematician and philosopher René Descartes, who introduced the concept of using two perpendicular number lines to locate points in space. The horizontal line is called the x-axis, and the vertical line is called the y-axis. Points are located on the plane using ordered pairs (x, y).