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Home > PC > Chapter 1 > Lesson 1.1.1 > Problem 1-6


All of the equations in the previous problem are functions. Describe what it means to be a “function.” Give equations of two non-functions and explain why these two examples are not functions.

A note on ICONS: You will see several different icons used in this course to designate a particular feature of the problem. They are:

Calculator OK

Calculator Icon

The problem shows a particular feature of your calculator.

Compute without a calculator

No Calculator Icon

Complete this problem without the use of your calculator.

Programming Icon

The problem shows you how to write a program for your calculator or asks you to write your own program.

Tool Kit Icon

The problem contains important information that should be added to your Tool Kit.

Checkpoint icon

The problem is your opportunity to verify that you have learned this topic.

Read the Math Notes box in this lesson.