In typical middle school math, there are two axis (plural is spelled same but pronounced different): dependent and independent. The x-axis (horizontal) is where the independent variable is normally plotted, and the y-axis (vertical) is where the dependent variable is plotted.
A good way to remember this is to make a statement about the graph. For example, if your x-axis is time in seconds and your y-axis is number of jumping-jacks, you could state the following: "the number of jumping jacks depends on the time in seconds." After all, the time wouldn't be dependent on the number of jumping jacks you can do, would it?
There can be cases where it makes sense to plot an independent variable vertically, rather than horizontally. Usually the title of the graph will give an indication that this is the purpose.
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It refers to the y or x axis on a graph. The x-axis is located at any point with 0 as the y point. The y-axis is located at any point with 0 as the x point.
It means the y-axis. Upon solving a problem what number goes into the place of y is your plot point on that axis.
If there is an independent variable then that goes on the x-axis. If not, either of two variables can go on the y-axis. With a chart in three or more dimensions, the second independent variable, if it exists, will go on the y-axis.
Rise is the vertical distance between the two points on the graph. This is measured using the Y axis.
The independent variable goes on the horizontal (x) axis.