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

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

• A. To plot the independent variable.
• B. To plot the error bars.
• C. To plot the dependent variable.
• D. To plot the control variable.

Answer: (C)

The main idea is that graphs are arranged so the quantity you measure in response to what you change sits on the vertical axis. The variable you control or vary is placed on the horizontal axis, so you can see how the measured outcome changes as you adjust the independent variable. This setup makes the relationship between cause and effect clear: the dependent variable is what you observe and record, and it’s plotted on the y-axis. Error bars show uncertainty around data points and aren’t axes themselves, while a control variable is something kept constant to isolate effects and also isn’t plotted as an axis. So the y-axis represents the dependent variable. For example, if you plot reaction rate versus temperature, the rate (dependent) goes on the vertical axis to show how it responds to changes in temperature (independent) on the horizontal axis.

The main idea is that graphs are arranged so the quantity you measure in response to what you change sits on the vertical axis. The variable you control or vary is placed on the horizontal axis, so you can see how the measured outcome changes as you adjust the independent variable. This setup makes the relationship between cause and effect clear: the dependent variable is what you observe and record, and it’s plotted on the y-axis. Error bars show uncertainty around data points and aren’t axes themselves, while a control variable is something kept constant to isolate effects and also isn’t plotted as an axis. So the y-axis represents the dependent variable. For example, if you plot reaction rate versus temperature, the rate (dependent) goes on the vertical axis to show how it responds to changes in temperature (independent) on the horizontal axis.