义务教育初中数学代数第三册介绍（续一）第十三章函数及其图象袁明德一内容与要求本章的主要内容是函数的基本概念以及几种简单的初等函数的图象和性质。本章首先从学生学过的数轴上的点与实数一一对应的关系，给出点在数轴上的坐标的概念，得出确定点在直线上的位置的方... Compulsory Education Junior Secondary Mathematics Algebra Volume 3 Introduction (Continued) Chapter 13 Functions and Their Images Yuan Mingde A Content and Requirements The main content of this chapter is the basic concept of functions and the images and properties of several simple elementary functions. In this chapter, first of all, the relationship between the point on the number axis and the real number is a one-to-one correspondence. The concept of the coordinates of the point on the axis is given and the position of the point on the straight line is determined.