A student decided to test the effects of watering on plants. she chooses 6 tomato plants and places all of them in the same part of a garden with plenty of space between them they get the same amount of sunlight and the same amout of fertilizer each day. she gives each plant a different amout of water with the first pla getting no water and the others getting 200ml, 400 ml,600 ml, 800 ml, and 1000 ml. She records the total height og the plants each day for 3 week what is the independent variable in this experiment?
