Bittinger M., Beecher J. Precalculus. Graphs and Models 5ed 2013

Textbook in PDF format

The Graphs and Models series by Bittinger, Beecher, Ellenbogen, and Penna is known for helping students "see the math" through its focus on visualization and technology. These texts continue to maintain the features that have helped students succeed for years: focus on functions, visual emphasis, side-by-side algebraic and graphical solutions, and real-data applications.
With the Fifth Edition, visualization is taken to a new level with technology. The authors also integrate smartphone apps, encouraging readers to visualize the math. In addition, ongoing review has been added with new Mid-Chapter Mixed Review exercise sets and new Study Guide summaries to help students prepare for tests.
Basic Concepts of Algebra
Graphs, Functions, and Models
More on Functions
Quadratic Functions and Equations; Inequalities
Polynomial Functions and Rational Functions
Exponential Functions and Logarithmic Functions
The Trigonometric Functions
Trigonometric Identities, Inverse Functions, and Equations
Applications of Trigonometry
Systems of Equations and Matrices
Analytic Geometry Topics
Sequences, Series, and Combinatorics