Chapter 10 - Section 10.5 - Derivatives: Numerical and Graphical Viewpoints - Exercises - Page 754: 67

Increasing: $ x\lt-1$ or $1\lt x$ Decreasing: $-1\lt x\lt1$

Increasing means that as $x$ increases, $y$ also increases. This happens when $ x\lt-1$ or $1\lt x$ Increasing means that as $x$ increases, $y$ decreases. This happens when $-1\lt x\lt1$