# Functions

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A function f is defined on a set of real numbers. Is f one-to-one? Please give explanation so I may understand.

(see attached file for function)

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##### Solution Summary

This shows how to determine if a function is one-to-one.

##### Solution Preview

The definition of a one-to-one function is: if f(x1)=f(x2), then x1=x2 for all elements x1 and x2 in the desired set.

Graphical translation: A function is one-to-one if it passes a horizontal line test. This means that if you graph the function ...

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