函数是中学数学的一个重要概念,也是高中数学的重要内容,它贯穿了整个中学教材,而初中阶段的一次函数,更是有着承上启下的作用,因此各省市都把一次函数作为中考命题中的考察知识点,尤其我们扬州地区对一次函数拓宽的更广,挖掘得 Function is an important concept of high school mathematics, but also an important part of high school mathematics, which runs through the entire secondary school textbooks, and a function of junior high school, but also has a bearing on the role, so the provinces and cities have a function as a test in the examination of the proposition Knowledge points, especially in our Yangzhou area to broaden a function wider, digging