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1 教材分析“一次函数”内容安排在华东师大版八年级(下)第17章“函数及其图象”的第3单元.本单元内容是在已经学习了平面直角坐标系、函数的图象基础上,让学生进一步理解函数的内涵,感受现实世界中数量之间存在的线性关系,经历如何应用一次函数知识解决实际问题.一次函数是学生接触基本函数的起点,
1 Textbook analysis “first function” content is arranged in the third grade of East China Normal University Edition eighth grade (lower) Chapter 17 “function and its image ”. This unit content is already studying the plane rectangular coordinate system. Based on the image of the function, students can further understand the connotation of the function, and experience the linear relationship between the number in the real world, and experience how to apply a function knowledge to solve practical problems. The first function is the starting point for students to contact the basic function.