Bob was doing an experiment to see what affects the growth of tomato plants. Bob uses a different fertilizer in each of the experimental groups. He keeps everything else constant. Each day, Bob measures the growth of the plants. The height of the tomato plants represents what in the experiment?

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.