The resulting heart rate of the fish is a Dependent Variable.
- Dependent variables are those that depend on independent variables or other elements. That is, if the independent variable is manipulated, it reflects a change in the dependent variable.
- In this example, the oxygen level is the independent variable which was manipulated resulting in a change in the heart rate of the fish.
- Independent variables are the cause. They are not affected by other factors. However, dependent variables are the effect. Therefore, the values of a dependent variable (here, the heart rate of the fish) change with changes in independent variable.
- In other words, independent variable influences the values of the dependent variable.
- Here, we wanted to understand the effects of altered oxygen level on the heart rate of fish. Hence, the heart rate of the fish is a dependent variable.
Therefore, the correct answer is if that the resulting heart rate of the fish is a dependent variable.
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