二次函数图象信息题,是根据抛物线在直角坐标系的位置信息(包括开口方向、对称轴位置、与坐标轴交点等)来确定其解析式及相关问题的一种题型.这种题型,简称图象信息题.解决这类问题的关键是:运用数形结合的思想和方法,抓住规律进行分析和推理. The quadratic function image information question is based on the position information of the parabola in the rectangular coordinate system (including the opening direction, the position of the axis of symmetry, the intersection with the coordinate axis, etc.) to determine its analytical formulae and related questions. Type, referred to as image information title. The key to solve this type of problem is: use the ideas and methods of combination of numbers and patterns, grasp the rules for analysis and reasoning.