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在九年级引入函数的概念是学习过程中顺应认知规律必须提出的概念,而函数概念的引入,需要教师创设符合学生实际的数学情境。从贴近学生实际出发,教材中给出了供选用三个具体的实例。函数的概念对于数学和数量学的每一个分支来说
The concept of introducing function in the ninth grade is the concept that must be put forward to conform to the law of cognition in the learning process. The introduction of the function concept requires the teacher to create a mathematical situation that suits the students’ actual situation. From the actual students close to the textbook is given for the selection of three specific examples. The concept of function is for every branch of mathematics and metrology