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what is the middle number when the numbers {2.3, –0.1, 1.9, –4, –3.2} are ordered from least to greatest?

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.