Online Resource: Functions/Modeling

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1. Application Centered Mathematical Modeling 
   This is a list of books dealing with the use mathematical modeling to solve real-world problems in various areas of applications.
2. Cool Math - Karen's Functions Page! Explain in very simple language functions
3. Function Basics
   Using album title as examples, develop functions that are found in the real world while keeping the definition of a function in mind.
4. Function Facts, The Function Institute
   What is the definition of a function? Gives a mathematical example of a function.
5. Functions
   "The notion of a function is one of the most basic in Mathematics. A set can be identified with its characteristic function. On the other hand, functions are defined in terms of sets. For various reasons, among which historical are not the least important, mathematicians use many terms to describe essentially the same object." This site starts with the basic definition of terms associated with vector spaces.
6. Math Refresher
   A refresher on functions and other topics to be used before taking Calculus.
7. Rocket Launch Vehicle Lesson 
   Content: From a real world description of a test on a rocket launch vehicle, graph the path of the flight and discuss whether it is a function.