1.函数图象是从“形”的角度来刻划函数的变化规律、表示量与量之间的依存关系的.函数图象是函数关系的直观表示,由函数的定义域和对应法则确定.图象可以是一条或几条线段或几条曲线,也可以是一群孤立点.画分段函数的图象时注意哪一段定义域内就适应哪一段的函数表达式. 1. Function image is from the “shape” point of view to characterization of the function of the law of change, the relationship between quantity and quantity. Function image is a visual representation of the function relationship, defined by the domain of the function and the corresponding law An image can be one or more segments or curves, or it can be a group of isolated points. When drawing an image of a piecewise function, note which section of the definition field fits to which function expression.