参赛学校：安徽省灵璧县娄庄中学 初中数学导学案  授课人：田 伟

课题             2.4二次函数y=ax2+bx+c的图像（第1课时）                                                                                                                                     课型  新授型

学                1. 能用配方法将二次函数y=ax2+bx+c化为y=a(x-h)2+k的形式；                                                                                                                              

习                2. 会作y=a(x-h)2+k图像；能说出y=a(x-h)2+k图像的开口方向，顶点坐标，对称轴和函数的增减性；                                                                                                              

目                3. 能指出y=a(x-h)2+k、y=a(x-h)2与y=ax2的函数图像间的关系，有一定的变化思想和意识；                                                                                                                  

标                 4. 理解a、h和k对二次函数y=a(x-h)2+k图像的影响。                                                                                                                                  

学习重点、难点及分析（略）                                                                                                                                                              

学法             自主探究 合作交流 当堂展示 相互评价                                                                                                                                        

学                二次函数的图像是一种非常有个性的图像。它有对称性、有最高点或最低点等。通过图像来分析函数的性质，是我们经常使用的方法。                                                                                                

法                你在学习二次函数的图像时，可以思考下列问题：