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Calculus For Dummies, 2nd Edition by Mark Ryan

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Chapter 5

Funky Functions and Their Groovy Graphs

In This Chapter

arrow Figuring out functions and relations

arrow Learning about lines

arrow Getting particular about parabolas

arrow Grappling with graphs

arrow Transforming functions and investigating inverse functions

Virtually everything you do in calculus concerns functions and their graphs in one way or another. Differential calculus involves finding the slope or steepness of various functions, and integral calculus involves computing the area underneath functions. And not only is the concept of a function critical for calculus, it’s one of the most fundamental ideas in all of mathematics.

What Is a Function?

Basically, a function is a relationship between two things in which the numerical value of one thing in some way depends on the value of the other. Examples are all around us: The average daily temperature for your city depends on, and is a function of, the time of year; the distance an object has fallen is a function of how much time has elapsed since ...

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