函数是建立数学模型的基础,如果要解决实际生活中的数学相关问题,就要建立数学模型,让学生可以利用函数结合身边的生活实际中出现的或者类似的一些数学问题来分析它,然后想办法解决。函数包括一次函数、反比例函数、二次函数等等。函数是初中数学的重要内容,是不可缺少的一部分,比较抽象。许多学生学起来感到很辛苦,觉得里面的内容很难理解,很难把握。尤其是二次函数的综合运用,学生往往是无从下手,很无助,很无奈,有时看到题目毫 Functions are the basis for building mathematical models. If you want to solve math-related problems in real life, you need to build mathematical models so that students can use the functions to analyze the mathematical problems that occur in or around the actual life around them to analyze it, and then think about it. Solution. Functions include primary functions, inverse proportional functions, quadratic functions, and so on. Function is an important part of junior high school mathematics. It is an indispensable part and relatively abstract. Many students find it hard to learn. They feel that the content is difficult to understand and difficult to grasp. In particular, the comprehensive use of quadratic functions, students are often unable to start, very helpless, very helpless, sometimes see the problem