论文部分内容阅读
一次函数y=kx+b(k≠0)中,k值决定一次函数的增减性,b值决定一次函数的图象与y轴交点的纵坐标.在k值不变,b值不断发生变化的情况下,函数图象的斜率不变,函数图象与y轴的交点坐标在不断地发生变化,我们形象地称之为函数图象的上下移动.函数图象的平移变换,是课程标准所要求的函数学习的主要内容之一.但课程标准只强调将一次函数的图象进行上下移动,而对函数图象的左右移动没有作出相应要求.那么一次函数图象的左右移动是否需要在教学中渗透,如果渗透的话,又如何做到合理有效呢?对此,笔者就个人理解及教学实施方案与同行
In the first-order function y = kx + b (k ≠ 0), the value of k determines the addition or subtraction of the first-order function, and the value of b determines the ordinate of the first-order image intersecting the y-axis. In the case of change, the slope of the function image is constant, and the coordinates of the intersection of the function image and the y-axis constantly change, which is vividly called the up-and-down movement of the function image. Standard requirements of the function of learning one of the main.But the standard only emphasizes the first-order function of the image to move up and down, and the left and right of the function image does not make the corresponding requirements.So a function of image left or right movement needs In the teaching of infiltration, if infiltration, then how to achieve reasonable and effective? In this regard, the author of personal understanding and implementation of teaching programs and colleagues