Revised to accommodate a stronger emphasis on graphing, this second edition introduces graphing and graphing techniques, functional notation, a transitional approach to graphing parabolas, and a formal development of functions. Also new to this edition are chapter-opening vignettes that introduce an environmental theme from which applications are drawn, Think About These exercises that promote and reinforce critical thinking skills, and Retain Your Skills exercises that encourage cumulative reviews. Numerous calculator exercises have been added throughout.