Adance competition on television had five elimination rounds. after each elimination, only one-fourth of the contestants were sent to the next round. the table below shows the number of contestants in each round of the competition: x 1 2 3 4 5 f(x) 512 128 32 8 2 compute the average rate of change of f(x) from x = 2 to x = 4, and describe what it represents. choices: -60 contestants per round, and it represents the average rate at which the number of contestants changed from the second round to the fourth round -120 contestants per round, and it represents the average rate