What is Y-axis?

The Y-axis is the other axis on a two-dimensional graph and is usually vertical. It is used to represent the dependent variable, which is the data that is being measured or observed. The Y-axis is used to plot values along the vertical direction, and the values along the Y-axis are typically represented as points, lines, or bars. The Y-axis is typically labeled with units of measurement or a description of the data being plotted. The Y-axis and the X-axis together form a rectangular coordinate system that allows you to plot and analyze data in a visual way.