Module 2  Topic 3  Rational Functions
"In Rational Functions, student analyze, graph, transform, and solve rational functions. The topic begins with a review of rational numbers and their reciprocals. Students then graph the reciprocals of basic polynomial functions to establish rational functions and to analyze key characteristics of their graphs. Familiar with horizontal asymptotes from their work with exponential functions, students now consider the vertical asymptotes inherent too many rational functions." Carnegie Textbook 
"Two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities."  Carnegie Textbook

Lesson 4  Operations with Rational Expressions
Lesson 5  Solving Problems with Rational Equations
Lesson 6  Solving Work, Mixture, Distance, and Cost Problems
