The product is a 1992 workbook titled “Patterns and Functions” by Elizabeth Phillips. It is a part of the National Council of Teachers of Mathematics’ curriculum and evaluation standards for middle school students in the subject area of applied mathematics. The book focuses on mathematical patterns and functions, making it an essential resource for educators teaching mathematics at the grades 5-8 level. With a paperback format and English language, this textbook is a valuable tool for students learning fundamental concepts in mathematics.