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Quick Reference

• The graph of a function
  A very useful pictorial representation of a function is the graph. In this leaflet, we remind you of important conventions when plotting a graph.
• What is a function?
  A quantity whose value can change is known as a variable. Functions are used to describe the rules which define the ways in which such a change can occur. The purpose of this leaflet is to explain functions and their notation.

Test Yourself

• Diagnostic Test - Introduction to Functions
• Exercise - Introduction to Functions