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 .

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.