一、知识要点1．三种函数的定义、图象和性质．2．会用三种函数的定义解题．2．掌握函数图象（或性质）与系数之间的关系及其应用．4正、反比例函数图象的平移．5．会求函数图象的交点．二、解题指导例1设（1）当，m为何值时，y是x的正比例函数？（2）当m为何值时，y是x的反比 First, knowledge points 1. The definition, image, and nature of the three functions. 2. The problem will be solved with the definition of three functions. 2. To grasp the relationship between functional images (or properties) and coefficients and their applications. 4 translation of positive and negative ratio function images. 5. Will find the intersection of function images. Second, the problem solving guide example 1 set (1) When, m, why, y is a positive proportional function of x? (2) When m is the value, y is the inverse of x