a student had heard that a goldfish will grow to the size of their tank she wanted to know if this was true or not, so she went to the store and bought fish and 3 different size tanks. in each of the tanks, she placed 3 fish (all 3 cm long), the required amount of water for that tank, 2 cm of gravel at the bottom, and installed the correct pump for that tank. each other month for a year she calculated the average length of the fish in each tank. her data is below