# Functions with the TI-84 Plus Calculator

by Brendan Kelly (Author), Teresa Kelly (Editor), Taisa Dorney (Illustrator)

Brendan Kelly is Professor Emeritus at the Faculty of Education, University of Toronto (OISE/UT). He holds two doctorate degrees: a Ph.D. in Mathematics (Number Theory) from U. of T. and an Ed.D. in Computer Applications from the Ontario Institute for Studies in Education. Dr. Kelly founded Brendan Kelly Publishing Inc. that now offers more than 20 titles including secondary school mathematics books that help teachers use Texas Instrument Graphing Calculators to teach mathematics. These books are sold widely throughout the United States and Canada and have been translated into Japanese for sale in their schools.

Paperback: 104 pages

Publisher: Brendan Kelly Publishing Inc.; 2nd edition (August 28, 2006)

Language: English

ISBN-10: 1895997259

ISBN-13: 978-1895997255

The properties of functions should be explored and discovered rather than taught and drilled. Students can explore various types of functions on the TI-84 Plus in cooperative groups or on their own as you facilitate their learning. Keying sequences guide them through the variety of menus on the TI-84 Plus without the need to page through the calculator manual.

Detailed solutions at the back of the book help students over obstacles to their learning and the operation of the menus and submenus are absorbed with minimal effort as the mathematics is learned. Deeper investigations are included to challenge the more capable student, and historical vignettes are introduced to add a human dimension to the mathematical excursions. This new publication has been expanded to include a more detailed treatment of linear and quadratic functions and the law of sines and cosines found in most state and provincial guidelines.

The topics include finding zeros, domain and range, extrema, and singularities of polynomial and rational functions. Properties of the trigonometric, exponential and logarithmic functions are also explored. Topics also include the study of limits and asymptotic behavior, polar coordinates, parametric equations and conics.

## Reviews

By John G. Barbour

User Rating: ★★★★★

This book can be very helpful in helping students of math with a good overview of functions. Functions form the backbone of higher math and many beginning calculus students are caught off guard because they are weak in this area. I was one of them and this book helped.

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