The vertical axis of a graph, often referred to as the y-axis, typically represents the dependent variable or the outcome being measured. It runs vertically from the bottom to the top of the graph and is labeled with units appropriate to the data being displayed. The values on this axis illustrate how the dependent variable changes in relation to the independent variable, which is usually plotted along the horizontal axis (x-axis).
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The convention for an x-y graph is as follows: y | | |_____ x where the x-axis is horizontal and the y-axis is vertical.
If you are graphing the results of an experiment, the dependent variable is on the vertical, or y-axis, and the independent variable is on the horizontal axis, or x-axis.
The vertical axis in a graph.
It is the Y-axis.
The x-axis is the horizontal axis on a graph. The y-axis is the vertical axis on a graph.