Answer:
Scientists use systems of variables and controls in experiments so that they can gather the most accurate data possible. In a scientific experiment, the variable is a factor that changes. Scientists might deliberately change a specific variable to test its effect on some other part of the system. The independent variable is the variable manipulated in the experiment. The dependent variable is the factor that changes in response to the independent variable. When presenting results, the independent variable is normally plotted along the x-axis, the dependent variable is plotted along the y-axis (SF Fig. 5.3).
Explanation:
