The dependent variable is the variable that is being measured or tested in an experiment. It is the outcome or response that is being studied and is expected to change as a result of the manipulation of the independent variable.
For example, in a study looking at the effect of different types of fertilizer on plant growth, the dependent variable would be the height of the plants. The researcher would measure the height of the plants after applying different types of fertilizer to see if there is a difference in growth.
In another example, a study may look at the relationship between hours of study and exam scores. In this case, the dependent variable would be the exam scores, as they are expected to change based on the amount of time spent studying.
Overall, the dependent variable is the variable that is being observed and measured in an experiment to determine the effect of the independent variable.