Functions and graphsAdditional / Further Maths

Reading a function table

Match an input with its output, or work backwards from a given output.

  • Read the input row first when asked for a function value.
  • When asked for an input, find the given output and read the value above it.
  • A table only gives the listed values unless more information is supplied.

Example 1

Follow the same column

Find .

Example 2

Find the input when .

Your turn

Question 1

Find .

Check answer
Question 2

Find .

Check answer
Question 3

Find .

Check answer
Question 4

Find the listed input for which .

Check answer
Question 5

Find the listed input for which .

Check answer
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