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Numeracy 4. 1. Consider the function f, defined on R, whose graph on the interval [-3, 3] is given below: y 1 -2 -1 0 1 2 Assuming that the function maintains this pattern of behaviour on all of R, give an algebraic description of the function f; that is, write down f(x) in such a way that we can compute the value of f for any given r E R