Let f(t) be the amount of garbage, in tons, produced by a city, and let t be the time in years after 2000. f ( t ) = 1,200 times (1.05)^t which of the following statements are true for the function given? the independent variable is f(t). when f(2) = 1,233, the 2 represents "the year 2002," and the 1,233 represents "1,233 tons of garbage produced." the independent variable is t. the dependent variable is f(t). the dependent variable is t. when f(2) = 1,323, the 2 represents "the year 2002," and the 1,323 represents "1,323 tons of garbage produced." when f(4) = 1,458.6, the 4 represents "the year 2004," and the 1,458.6 represents "1,458.6 tons of garbage produced."