规划问题是高中阶段直线的一个重要应用.规划问题有三要素:变量,可行域,目标函数.规划问题综合了平面知识、不等式性质、代数式的几何意义等很多方面,对培养学生的综合能力有着重要的作用.笔者整理近几年涉及到规划问题中常见的目标函数,汇总得到四种常见类型的目标函 The planning problem is an important application of the high school straight line.There are three elements of the planning problem: variables, feasible areas, objective functions.Planning problems are important for students’ comprehensive ability in many aspects, such as the plane knowledge, the nature of inequality, the geometric meaning of algebra, The author arranges in recent years related to the planning of the common objective function, summarizes the four common types of objective letter