The variables would be as follows:
- Independent variable: exercise
- Dependent variable: weight gained
- Controlled variable: not stated
Independent variables are variables supplied and varied across different subject groups during experiments.
Dependent variable is the actual variable to be measured during experiment. The value of dependent variable depends on the value of independent variable supplied.
Controlled variables are other variables in experiment that are held constant across all groups.
In this case, a group was supplied with exercise while another group was not. The exercise, thus, serves as the independent variable.
The weigh gained by the subject would likely depend on the whether they exercised or not. Hence, the weight gained serves as the dependent variable.
More on experimental variables can be found here: https://brainly.com/question/6350073
