一次函数是中考必考内容之一,且题型丰富新颖.下面精选近年来中考试题分类解析如下:一、运用一次函数概念求函数表达式中的字母例1若正比例函数y=(m-1)xm2-3,y随x的增大而减小,则m的值为!“#$.分析:依据正比例函数定义知,x的指数应为1,得到关于m的方程,同时结合m-10这一限制条 A function is one of the contents of the examination, and the questions are rich in novelty. The following selection of recent examination questions is classified as follows: First, use the concept of a one-function function to find the letter in the function expression 1 if the proportional function y=(m- 1) xm2-3, y decreases with the increase of x, then the value of m is !”#$. Analysis: According to the definition of proportional function, the exponent of x should be 1, get the equation about m, and combine M-10 this limit