Without changing any x coordinates,all of the y coordinates are transformed to their opposite numbers (or additive inverses) and then are rescaled by a factor of 4.In terms of graph,the graph of y= -4...好长哦~如果考试的话要全写吗，后面那段话什么意思flipping翻转y=f(x)和vertically stretching垂直拉伸至4倍这是什么意思第一句可以不写。比较两个函数的图像，就是要说明y=-4f(x)是怎么从y=f(x)的图像变化来的，这样就清楚的对比了两个图像的关系。翻转y=f(x)其实是以x轴为对称轴做的上下翻转。垂直拉伸就是将所有的y值统一增大到原来的4倍。