Name: _______________ Date: _______________Relations and Functions Practice Test Multiple Choice (1 mark each) Use the following information to answer the next question. A farmer read a study of soil fertility and mineral absorption. It contained the graph below. The graph illustrates the relative absorption of copper by the top and bottom of a wheat plant when the plant was subjected to various solutions containing a fixed amount of copper but having different concentrations of aluminum. From this graph, the farmer concluded that the relative absorption of copper consistently decreased at the A top of a wheat as the aluminum concentration increased B top of a wheat as the aluminum concentration decreased C bottom of a wheat as the aluminum concentration increased