Precalculus: Graphical, Numerical, Algebraic

Key differences between 8th and 7th editions

• Period between current and previous publications: 4 years (2010 vs 2006).
• The content between the 8th and 7th editions hasn't changed significantly.
• Main content changes in the 8th edition of Demana/Waits/Foley/Kennedy's Precalculus: Graphical, Numerical, Algebraic:
• Chapter 1:
• The chapter opener on the consumer price index for housing has been updated with a real-world caution against extrapolation, exemplified by the mortgage meltdown of 2008.
• Section "Grapher Failure and Hidden Behavior" reflects the changing capabilities of the technology.
• Chapter 2:
• The introduction of linear correlation provides a caution against unwarranted conclusions.
• Clarification of approximate answers.
• Chapter 3:
• Section 3.6 "Mathematics of Finance" includes an introduction to the Finance menu on the graphing calculator.
• Chapter 7:
• Section 7.1 "Solving Systems of Two Equations" has been realigned to be focused more on the algebraic means of solution in preparation for the matrix methods to follow.
• Chapter 8:
• Incorporates the new classification of planets in the solar system.
• Chapter 9: includes new section "9.9. Statistical Literacy" with discussions on:
• The Many Misuses of Statistics
• Correlation Revisited
• The Importance of Randomness
• Surveys and Observational Studies
• Experimental Design
• Using Randomness
• Probability Simulations