Functions come in many shapes and sizes. In fact,
you’ve already seen quadratic functions such as *f*(*x*) = *x*^{2}
+ 7*x* – 5 in the Algebra chapter and trigonometric functions such as *f*(*x*)
= sin *x* and *f*(*x*) = cos *x* in the Trigonometry
chapter.

This chapter explains the specific notation, behavior, and properties of functions that you will need to know for the Subject Math test.

About six questions on the Subject Math cover functions. These questions can range from rather simple substitution problems to conceptual problems about the definition of a function to questions that test your ability to graph functions.

**Click Next to display next topic in the chapter.**

Mathematics Practice Questions

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