11) Read the following paragraph. Then, answer the question. Johnny notices that when he runs up the stairs at school, he is short of breath and
very tired. He decides he wants to lose weight and get healthy. Johnny spends a
couple of days recording everything he eats and notices that he drinks soda three
times a day and only drinks water once a day. Johnny hypothesizes that if he stops
drinking soda, then he will lose weight. Johnny decides to only drink water for one
month and monitor his weight. Every week on Sunday morning, Johnny weighs
himself. After the first week, he lost four pounds. For each Sunday after that, he
continued to lose two pounds a week, losing a total of ten pounds.
What is the independent variable?