The x-axis in a graph is typically used for:

The x-axis in a graph is typically used for:

• A. To display the standard deviation.
• B. To plot the independent variable.
• C. To show the average value.
• D. To plot the dependent variable.

Answer: (B)

In graphs, the horizontal axis is used to display the independent variable—the input you control and vary to see its effect. The independent variable is what you change to observe how the outcome responds, so it sits along the x-axis while the dependent variable—the result you measure—is plotted on the vertical axis. This setup makes trends and relationships between input and output easy to spot and analyze. Standard deviation describes how spread out the data are, not a variable you plot along the x-axis. The average value is a single statistic, not something that is varied along an axis. The dependent variable is what you plot on the vertical axis, not the horizontal.

In graphs, the horizontal axis is used to display the independent variable—the input you control and vary to see its effect. The independent variable is what you change to observe how the outcome responds, so it sits along the x-axis while the dependent variable—the result you measure—is plotted on the vertical axis. This setup makes trends and relationships between input and output easy to spot and analyze.

Standard deviation describes how spread out the data are, not a variable you plot along the x-axis. The average value is a single statistic, not something that is varied along an axis. The dependent variable is what you plot on the vertical axis, not the horizontal.