A very simple example of a functional relationship between depth of water and time is shown here. In fact, it might be more useful to use a coastal tide book to better illustrate this real-world experience. Pupils are to count the number of high tides, low tides, and the time between. It makes a good introduction to functions and their graphs.

Concepts

functions, linear relationships, linear

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Additional Tags

linear relationship, function, math

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Pros

• A good model for a graph of a function

Cons

• None

Common Core

8.F.B.5 MP5