1: Review
- Page ID
- 80872
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- 1.1: Functions
- The natural world is full of relationships between quantities that change. When we see these relationships, it is natural for us to ask If I know one quantity, can I then determine the other? This establishes the idea of an input quantity, or independent variable, and a corresponding output quantity, or dependent variable. From this we get the notion of a functional relationship in which the output can be determined from the input.