
2-1
2
Functions and Graphs
L E A RNIN G OBJE C TI V E S
After reading this chapter, you will be conversant with:
♦ Functions and Types of Functions
♦ Composition of Functions
♦ Inverse Functions
♦ Graphs of Functions
♦ Increasing and Decreasing Functions
♦ Polar Coordinates
Introduction
The concept of “function” is important in mathematics. Functions are used to describe or study how
the value of one quantity depends on the value of some other quantity. For instance, a one-variable
function is simply a formula or an equation that represents a relationship between two quantities. In
this chapter, we will discuss in detail about one-variable functions, ...