Learning objectives

• Interpret second derivatives
• Understand relative rates (such as birth rates)  
• Understand elasticity (such as price elasticity of demand)

Before class

• Read Hughes-Hallett  2.3 (relative rate of change), 2.4, 4.6
• Ponder problems 2.3. 42, 43, 44, 46; 2.4. 2, 10, 20, 26; 4.6. 1, 2, 3, 4.
• Consult the main points of the lesson.
• Consult notes on two types of change and three derivatives

.In class

• Work on problems from the textbook.
• Graphical differentiation