Functions

• What does domain mean in terms of functions?

  Input (x values)
• The domain is the set of all possible input values that can be used to find an output value.
• What does range mean in terms of functions?

  Set of all possible output values.
• How would you do a composite function of fg(x)

  First g(x) then f(gx)
• How would you calculate an inverse function?

  • Switch x and y
  • Rearrange to make y the subject
• What is reflected in inverse functions?

  Reflection across the line y = x.