平面内坐标满足函数解析式y=f(x)的点的集合,叫做函数y=f(x)的图像。如果图形C与函数y=f(x)建立如下的关系:1.图形C上的点的坐标都满足函数解析式y=f(x); The set of points whose in-plane coordinates satisfies the function analytical formula y=f(x) is called the image of the function y=f(x). If the graph C establishes the following relationship with the function y=f(x): 1. The coordinates of the points on the graph C satisfy the function analytical formula y=f(x);