How do you use a graph to find the value of f-1(2)
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f−1(f(x)) = x. ... the graph of y = f−1(x) is a reflection of the graph of y = f(x) in the line y = x and vice versa. Note The reflection of the point (x1,y1) n the line y = x is (y1,x1). Therefore if the point (x1,y1) is on the graph of y = f−1(x), we must have (y1,x1) on the graph of y = f(x).
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