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函数是近代科技不可缺少的工具,也是中学数学教学的重要内容之一。由于函数概念的抽象,函数性质的应用灵活多变,也是中学教学的难点之一。而函数的图象把两变量间的依赖关系和函数的性质直观形象地刻划出来,它是研究函数的重要工具。但是连续两年高考试题中求作函数图象的题目得分甚少,说明学生作函数图象的能力较差,尤其运用对称和平移关
Function is an indispensable tool for modern science and technology, and it is also one of the important contents of mathematics teaching in middle school. Due to the abstraction of the concept of function, the flexible application of the nature of function is one of the difficulties in the teaching of middle school. The function’s image sculpts the dependencies between the two variables and the nature of the function intuitively and visually. It is an important tool for studying functions. However, in the two consecutive years of high test questions, the title scores for functional images are very small, which indicates that students have poor ability to perform functional images, especially using symmetry and translation.