What is Z-axis?

The Z-axis is the third axis in a three-dimensional coordinate system. It is perpendicular to the X-axis and Y-axis, and is used to represent the third dimension in a three-dimensional graph. The Z-axis is used to plot values along the depth direction and is typically represented as a third dimension in a 3D graph. The Z-axis is usually represented as a vertical axis that runs perpendicular to the X-Y plane. The Z-axis is labeled with units of measurement or a description of the data being plotted. By using the three axes, X, Y, and Z, you can represent and visualize three-dimensional data in a graphical format.