A student decides to test the effects of watering on plants. She chooses six tomato plants in places all of them in the same part of the garden was plenty of space between them. They get the same amount of sunlight in the same amount of fertilizer each day she gives each plant a different amount of water with the first plant getting no water and the other is getting 200 mL 400 mL 600 mL 800 mL and 1000 mL she records the total height of the plants each day for three weeks, what is the independent variable in this experiment?
