In this project, i used a garlic like plant and put in a water bottle. Everyday i measure the growth of the plant, and i found out that each day, it increases by a different kind of rate. The growth of this plant isn't linear, it is an nonlinear relationship. Everytime it increases like .3 or .5 centimeter. So the relationship doesn't go in a pattern. There are several times where there had been going in a pattern then it grows in a different pattern again.
There were some difficulties in this project, which was the weather change because it effects how much the water decreases while the plant increases. I didn't measure the water in this project because it was kind of difficult. And in this project, the plants growth is always changing, so the project was so hard for the change... well it was also easy because the change of the plant is obvious, and no prediction is needed.