函数是数学知识系统中非常重要的知识点,因为函数不仅在未来的中考考试中占据很大的分数比重,也是学生未来深入学习、深造的基础.特别是初中函数作为基础的数学知识,无论对于学生数学思维的培养还是深层次的数学研究都发挥着十分重要的作用.函数的教学与学习需要一套科学的方法和运用,这样才能收到良好的教学效果.一、坐标引导、逐层深入函数教学离不开坐标系的支持,因为无论是一次函数还是二次函数,其图象都体现在坐标系中,不同的函数图象具有不 Function is a very important knowledge point in the system of mathematical knowledge, because not only does the function occupy a large proportion of the scores in the future senior high school entrance examination, but also is the basis for further study and further study of the students in the future, especially the mathematics knowledge based on the junior high school function as the foundation, The cultivation of mathematical thinking of students is also a deep-seated mathematical research plays a very important role in teaching and learning function requires a set of scientific methods and use, so as to receive a good teaching effect. First, the coordinate guide, layer by layer Function teaching can not be separated from the support of the coordinate system, because no matter it is a function or a quadratic function, its images are reflected in the coordinate system, different function images have not