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 graph of the invertible function f is shown on the grid below.
What is the value of f, start superscript, minus, 1, end superscript, left parenthesis, 4, right parenthesis?
  • Your answer should be
  • an integer, like 6
  • a proper fraction, like 1, slash, 2 or 6, slash, 10
  • an improper fraction, like 10, slash, 7 or 14, slash, 8
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i
Get 3 answers correct in a row