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< Exercises

Evaluate inverse functions

The graph of the invertible function ff is shown on the grid below.
What is the value of f−1(6)f^{-1}(6)?
  • Your answer should be
  • an integer, like 66
  • a proper fraction, like 1/21/2 or 6/106/10
  • an improper fraction, like 10/710/7 or 14/814/8
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}