Find a and d for the function f(x) = a cos(x) + d such that the graph of f matches the figure. a = |2 d = -1 4 y 3- 2- 1- - 2n

Q: 80 Height (metres) 40 Y 5 10 15 Time (minutes) 20 25 30

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A: The objective is to find which relation is not a function.