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31-32 Find an explicit formula for f−1 and use it to graph f−1, f, and the line y = x on the same screen. To check your work, see whether the graphs of f and f−1 are reflections about the line. 31. f(x) = 4x + 3 32. f(x) = 1 + e−x

31-32 Find an explicit formula for f−1 and use it to graph f−1, f, and the line y = x on the same screen. To check your work, see whether the graphs of f and f−1 are reflections about the line. 31. f(x) = 4x + 3 32. f(x) = 1 + e−x

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W31-32 Find an explicit formula for f − 1 and use it to graph f − 1 , f , and the line y = x on the same screen. To check your work, see whether the graphs of f and f − 1 are reflections about the line. 31. f ( x ) = 4 x + 3 32. f ( x ) = 1 + e − x

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