函数图象是中学数学教学的重点内容之一,并且是高中学习函数和解析几何的基础.它变换灵活,应用非常广泛.因此在历年的中考或高考数学试题中占有相当的比重.这些试题不仅可测试有关函数和几何的基础知识、基本技能、基本方法,而且能更有效的测 Function image is one of the key contents of mathematics teaching in middle school, and it is the basis of high school learning function and analytic geometry. It is flexible in transformation and widely used. Therefore it occupies a considerable proportion in the annual examination or mathematics test of college entrance examination. These questions are not only Can test basic knowledge, basic skills, and basic methods of functions and geometry, and can test more effectively