Teri is studying the growth of the population of frogs in a lake. The table below shows the number of frogs with respect to the number of months since Teri began her study. Months 1 2 3 4 5 Number of Frogs 50 150 450 1,350 4,050 The independent variable in the relationship is the and should be placed on the . The dependent variable in the relationship is the and should be placed on the .