# Ch 16: ACT Math: Functions

Get ready for the college-entry ACT with this online review of math functions. Use these quick videos and informative quizzes to help you prepare for test day.

## ACT Math: Functions - Chapter Summary

Our lessons define functions and review the basic, key terms. You'll look at the following topics:

• Composing functions
• Working with functions: adding, subtracting, multiplying and dividing
• Range and domain
• Compounding and graphing
• Inverse functions
• Polynomials: properties, factoring, exponentials and simplifying

In addition to the motivating videos and quizzes for self-assessment, this chapter also guides you through practice problems in the identification, application and notation of function operations.

### ACT Math Objectives

The ACT assesses your math skills through a 60-minute exam with 60 multiple-choice questions. You won't need to know complicated formulas, but the test does assume an understanding of basic computational skills and fundamental formulas. The test covers six content areas:

• Pre-algebra
• Elementary algebra
• Intermediate algebra
• Coordinate geometry
• Plane geometry
• Trigonometry

The elementary algebra portion comprises 17% of the test questions and includes the following areas:

• Properties of exponents
• Using variables to express functional relationships
• Understanding algebraic operations

The part of the test that addresses intermediate algebra topics constitutes 15% of the exam and involves the topics below:

• Functions
• Modeling
• Polynomials

You'll receive four math scores, including an overall score for all of the questions and sub-scores for pre-algebra/elementary algebra, intermediate algebra/coordinate geometry and plane geometry/trigonometry.

The lessons in this chapter will assist your review of functions for the ACT. Start with the basics, and then work on applying, composing, compounding and graphing functions. Complete the problems in identification and notation for extra practice.

9 Lessons in Chapter 16: ACT Math: Functions
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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