Final answer:
The independent variable is manipulated or changed in an experiment, while the dependent variable is the response that changes in response to the independent variable.
Step-by-step explanation:
The variable that is manipulated or changed in an experiment is called the independent variable. In this case, the independent variable is x, which is referred to as the control variable in the question. The response variable is the dependent variable, which is y. The dependent variable is the outcome or result that is being measured or observed, and it changes in response to changes in the independent variable.
Learn more about Independent and dependent variables