重点难点易混易错点剖析本节的学习内容主要是一次函数y=kx+b(k≠0)的概念、图象、性质以及简单的实际应用.要注意体悟数形结合和函数的思想,善于利用图象获取信息进行推断.通过构造一次函数模型,求一些实际问题中的最值.待定系数法是确定各种函数解析式的重要工具,应掌握和熟练运用.易混易错点是不能由k与b的符号正确判断图象的走向及经过的象限,在求解图象与 The main points of difficulty is easy to misuse and error analysis The main content of this section is the concept of a function y = kx + b (k ≠ 0), the image, the nature and simple practical application. , Is good at using the image to obtain information to infer.From the construction of a one-way function model, and seek some practical problems in the most value.Determined coefficient method is to determine a variety of analytical functions of the important tools, should master and skilled use. Is the symbol of k and b can not correctly determine the direction of the image and the quadrant passed in solving the image and