What is the independent variable

1. Use the following setup to answer the questions below: Problem: Do nutrients have an effect on the rate of plant growth? o All plants used were the same height o Two groups: Group A - given 30 mL of distilled water for 7 days Group B - given 30 mL of water containing .1 gram of fertilizer for 7 days a. State a possible hypothesis: the Plant that uses both water and fertilizer will grow at a Foster Rate then the plant grown only w/ water. b. What are two factors that must be kept the same (constant) between both groups? Both groups used 30ml of water and was given the Same amount of days to grow c. What is the independent variable? d. What is the dependent variable? e. Which is the experimental group