This informal, readable text, is intended for a one or two-semester course in precalculus mathematics or algebra and trigonometry. Features include functions and functional notation presented with realistic examples rather than abstract terms and extensive treatment of graphing techniques and graph reading to strengthen student understanding of functions. Innovative explanations of standard topics such as absolute value and slopes of lines and optional "Excursion" sections that provide additional coverage of various topics are included. An optional chapter on limits (Ch. 11), and sections on polar coordinates and polar equations of conics in Ch. 8 and vectors in the plane and dot product in Ch. 7 add to the depth of coverage. A realistic approach to scientific and graphing calculators, including their limitations, is offered throughout the text, and a sepatate graphing calculator supplement offers added discsussion, examples, and exercises.

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