统计图表在日常生活、生产劳动、科学研究和展览中经常用到。从小学低年级起,各册教材都渗透了一些有关统计的知识,学生在日常生活中也接触到一些统计图表,这是学好本单元的基础。本单元是统计学的初步知识,这些知识孕育了平面直角坐标系和函数思想,为进一步学习统计知识和制作统计图表打下基础。本单元 Statistics charts are often used in everyday life, productive labor, scientific research and exhibitions. Since the elementary school, all books have infiltrated some knowledge about statistics. Students also have access to some statistical charts in their daily life. This is the basis for learning this module. This unit is a preliminary statistical knowledge, which gave birth to the Cartesian coordinate system and function ideas, which laid the foundation for further study of statistical knowledge and production of statistical charts. This unit