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This is an introduction and list of the so-called “library of functions”.

The primary goal of precalculus is to familiarize the student with a core list of functions and the manipulations and techniques that correspond to those functions. In this topic we will give a brief overview of the function types we will study. This list is commonly referred to as the “library of functions”.

Some techniques and manipulations will work on all of these functions universally. These are what we cover in the universal property section next. Each of these functions have been studied for hundreds and even thousands of years however, and as a result for each of them there are a number of clever and useful techniques that one needs to succeed in calculus. For this reason we will study each of these functions individually in the relevant ‘exploration’ topics later.

#### The functions in the ‘library of functions’

The full “library of functions” for a calculus student

are composed of the following functions:
(a)
Polynomials
• linear functions
• cubic functions
• higher level polynomials
(b)
(c)
Exponentials
(d)
Logarithms
(e)
Piecewise Functions.
(f)
Absolute Value.
(g)
Rational Functions.
(h)
Trigonometric Functions.
• sine
• cosine
• tangent
• cotangent
• secant
• cosecant

In this course we will be learning about all the above functions except the trigonometric functions.

In this section we will give a (very) brief overview of the function types and their core representations - known as a “parent function” for each function type.

By the end of this section a student should be able to identify and know the properties of different ‘parent functions’. This includes the following:

• Name each of the parent function types from the library of functions.
• Identify each parent function by its graph.
• Identify the parent function of an equation.
• Sketch each parent function, including notable points and any of the provided function specific features.
• Identify the underlying parent function of: a graph of a parent function that has undergone basic manipulations (eg flips, movements left/right/up/down and/or stretching)