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一、教材分析本课是苏科版数学教材八年级(上)第五章“一次函数”部分的第二课时,主要是在学生学习了一次函数概念的基础上,从点燃的蚊香这一事例出发,向学生渗透建立一次函数的数学模型解决数学问题,同时以弹簧计这一具体情境下的函数关系式的确立应该还有一般函数关系式的解决办法。学习了一次函数之后,学生对研究函数的基本方法有了一个初步的了解,再讨论二次函数和反比例函数的有关问题,就有基础了.
First, the textbook analysis This class is Suke version of mathematics textbooks eighth grade (on) fifth chapter “a function ” part of the second class, mainly in the students learn a function concept, based on lit mosquito In one case, the mathematical model solving the mathematical problem by infiltrating the students into a function is solved. At the same time, the establishment of the functional relation in the specific situation of the spring gauge should have the solution of the general functional relation. After learning a function, students have a basic understanding of the basic methods of studying functions, and then discuss the related problems of quadratic functions and inverse proportion functions.