Question

To test the effect of red bull on running speed, a group of ten runners drink water before a race and are timed. A day later the same runners drink red bull before the race and are again timed. The times are compared and it turns out that they ran faster after drinking red bull. The running speed is the _________ variable in this experiment.

Answer 1

Answer:

independent

Explanation:the red bull is isolated and is the only variable in the question that has changed.

Answer 2

The running speed is the dependent variable because it is the outcome/results of the experiment. The reason for this is because it relies/depends on the independent variable, which is the red bull. The control group of this experiment would be drinking water.