Andrika has learned that the hot water in her house is always gone by 6:30 am. She knows
that this is because her sisters and mother always get to the shower before her. She decides to
experiment with her morning routine to see if she can get a hot shower in the morning. Over the
course of a week, she changes the time that she gets up, making it 10 minutes earlier each day.
What is the dependent variable in this experiment?