The "x-axis" usually refers to the horizontal axis. In Excel, that would be relevant for graphs created with Excel.
Those are the four "quadrants".
On a chart created in Excel, the vertical axis is also called the y-axis. It typically represents the values or measurements of the data being plotted. The horizontal axis, or x-axis, complements it by showing the categories or intervals for the data. Together, these axes help in visualizing the relationship between different data points.
It was the French mathematician Rene Descartes who created coordinated geometry using an horizontal x axis and a vertical y axis that are perpendicular to each other
Once a graph has been created, y would be the axis which is shown up and down on the graph. The x axis is shown from left to right on the graph. Both are reference lines on a graph.
Blood Axis was created in 1989.
Axis Amerika was created in 1987.
Axis Bank was created in 1994.
Axis Mutatis was created in 1995.
The Beijing Axis was created in 2002.
The Axis of Perdition was created in 2002.
Exploring the Axis was created in 1985.
Axis of Advance was created in 1998.
Axis - novel - was created in 2007.
Discordance Axis was created in 1992.
Axis Communications was created in 1984.
Spinning on an Axis was created in 2001.