Increasing, decreasing, positive or negative intervals

You are given the graph of a function f. Determine the intervals where f is increasing, constant, or decreasing. | Numerade

If a function f is increasing on the intervals [-5,5] and [13,21] and decreasing on the interval [5,13], determine the interval(s) on which g(x)=-3f(2x-5) is increasing.The graph g(x)=-3f(2x-5) is increasing on the interval ( , ).(Type your answer in interval notation.)

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