1·问题的提出与思考.一次函数图象“平行、垂直”关系的教学研究,教材编排在高中阶段学习.在初中数学虽然没见“斜率”一词,但一次函数图象的“平行、垂直”关系却经常出现,并且需要学生能熟练解答,尤其是在中考试题中出现,虽然可以采用待定系数法、三角形相似等方法解决,但事实上学生遇到题型比较复杂时,往往会因对应关系 1.Proposing and thinking of the problem. A teaching study of the relationship between function image “parallel, vertical ”, textbooks arranged in the high school stage. Although in the junior middle school mathematics did not see “slope”, but a function image The “parallel, vertical,” relationship often appears, and requires students to be able to answer proficiently, especially in the mid-test questions. Although it can be solved by the method of undetermined coefficients, triangles, etc., in fact, students encounter problem type comparisons. When complex, often due to correspondence