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在学生学习一次函数图像时,我们常常将一次函数图像经过的象限总结为:当k>0,b>0函数图象经过一、二、三象限;当k>0,b<0函数图象经过一、三、四象限;当k<0,b>0函数图象经过一、二、四象限;当k<0,b<0函数图象经过二、三、四象限.大部分学生在初学时较易记忆,但经过一段时间就忘记了,如何让学生理解并有效记忆,从教多年总结出了以下方法,希望对学生们有所帮助.我们知道一次函数图像是一条直线,两点决定一条直
When students study a function image once, we often summarize the quadrants through which the function image passes. When k> 0, b> 0, the function image goes through one, two or three quadrants. When k> 0, b <0, After one, three, four quadrants, when k <0, b> 0, the function image goes through one, two and four quadrants; when k <0, b <0 passes through two, three and four quadrants. Beginners easier to remember, but after a period of time to forget, how to make students understand and effective memory, taught from many years to sum up the following methods, I hope to help students.We know that a function of the image is a straight line, two decision A straight