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## The Function Institute from Zona Land

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This
gives comprehensive discussion on definition of a function with Java Applets
that illustrates very clearly one-to-one, one-to-many, many-to-one
concepts. It has pages on
different types of functions (linear, polynomial, rational, exponential,
trigonometric) and their interactive graphs.

http://id.mind.net/~zona/mmts/functionInstitute/functionInstitute.html

### Functions, Graphing, and Modeling

A large interactive tutorial using a Java program as a graphing
tool, aimed to prepare students for calculus. Topics include functions,
graphing, exponential, logarithmic, trigonometric, and algebraic functions.

http://campus.northpark.edu/math/PreCalculus/TOC.html

## Maths Online Gallery: Functions 1

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Collection of Java applets with exercises and some lesson plans:
Function and graph, Recognize function graphs puzzles, Polynomial of third
order, and a Function plotter.

http://www.univie.ac.at/future.media/moe/galerie/fun1/fun1.html#funktion

## Maths Online Gallery: Functions 2

Collection of Java applets with exercises: Recognize
function graphs puzzles that concentrate on negative power functions and
trigonometric functions, and graph collections of exponential & logarithmic
functions, and trigonometric functions.

http://www.univie.ac.at/future.media/moe/galerie/fun2/fun2.html#graphenel