Home > PCT > Chapter Ch1 > 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 Icon The problem shows a particular feature of your 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.