Help with independent, dependent and controlled variables please?

Question

anonymous · Answer

First you would make an observation on something
Observation: My car won’t start
Question: Why is my car not starting up?
Second, you will make a hypothesis. 
Hypothesis: The battery is dead.
Second Hypothesis: The car is out of fuel. 
Third, make a prediction
Prediction: I’ll replace the battery and then see if it starts
Fourth, you’ll do the experiment
Experiment: Replace the battery and see if it starts.
Lastly, form the conclusion
Conclusion: My car wouldn't start because the battery was dead.

Controlled Variable:
Independent:
Dependent: