在解有关一次函数的开放型题时,要充分利用一次函数的概念、图象及性质,同时还要选择恰当的解题策略,并注意分类讨论等方法的使用.下面以中考试题为例,归类介绍有关的开放型问题,供同学们学习时参考.1.条件开放类(根据一次函数增减性补充条件) When solving an open-ended question about a function, we must make full use of the concept, image, and nature of the first-order function, and at the same time, select the appropriate problem-solving strategy and pay attention to the use of methods such as classification and discussion. Take the middle-test questions as an example. Categorization introduces relevant open questions for students to learn when referencing. 1. Conditional open categories (additional conditions based on one function increase or decrease)