Practice evaluating the inverse function of a function that is given either as a formula, or as a graph, or as a table of values.

Problem

The table below shows some inputs and outputs of the invertible function f with domain all real numbers.
x5311809
f, left parenthesis, x, right parenthesis9minus, 2minus, 5minus, 1111
Find the following values:
f, start superscript, minus, 1, end superscript, left parenthesis, minus, 2, right parenthesis, equals
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
f, start superscript, minus, 1, end superscript, left parenthesis, 1, right parenthesis, equals
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4