3 Functions
A function is a rule that turns one number into another. Almost every later chapter studies some particular family of them, so it is worth being exact about what the word means and what can go wrong.
3.1 Ordered pairs and relations
3.1.1 Classifying relations
3.2 Functions
3.3 Composite functions
3.4 Odd and even functions
3.5 Inverse of a function
3.5.1 Finding an inverse
3.6 Practice problems
3.1.1 Classifying relations
3.2 Functions
3.3 Composite functions
3.4 Odd and even functions
3.5 Inverse of a function
3.5.1 Finding an inverse
3.6 Practice problems
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