函数《函数》是数学中考的重点与热点，纵观今年各省、市中考数学试卷，在考查对函数三“元件”（定义域、值域、对应法则）的理解与运用的同时，题目的设计上注意了与三角、几何知识的结合；注意了图形语言的翻译；注意了实际应用的渗透；注意了将对称、增减变化、图形平移等 The function “function” is the focus and hot spot of the mathematics examination. Throughout this year’s provincial and municipal mathematics examination papers, while examining the understanding and application of the three “elements” (domains, values, and corresponding rules) of the function, the topic The design pays attention to the combination of trigonometry and geometry knowledge; pays attention to the translation of the graphic language; pays attention to the penetration of practical applications; pays attention to the symmetry, increase and decrease changes, graphic shift, etc.