I obtained the Math Kentei Grade Pre-2 while in the first year of junior high school. I purchased this book to follow up on areas where I struggled at that time. This is a problem book on linear functions for second-year junior high school students, where you can learn how to read graphs and understand slopes. No writing inside. - Title: Linear Functions for Junior High School 2nd Grade Math - Publisher: Kumon Publishing - Price: 660 yen - Contents: Problem book to deepen understanding of how to read graphs and slopes Thank you for looking.