(Algebra > Relations and Functions > Functions)

The document Input/Output Tables informally introduces students to functions using a function machine and tables.

Students examine relationships between input and output values to find function rules. They also find corresponding output values given a function rule and input values, as well as determine input values given a function rule and output values.

The document begins with a simple real world relationship that leads students to determine this relationship and then express it using symbols. In subsequent pages, students find input or output values and use algebraic expressions to represent function rules. The term function is not used in the document, since this is meant to be an informal introduction to functions. Students will formally use functions in other documents, such as Relations and Functions and Representations of Functions.

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