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1．知识回顾2．图形特点选择统计图时要求注意三种统计图的各自特点．条形统计图是用高度表示数据的大小,可以反映数据间的大小关系,能清楚地表示出每个对象的具体数目．折线统计图是连接各个表示相应时刻的数据的点的折线来表示数据的变化情况,能清楚地反映事物的变化情况．扇形统计图的特点是反映部分与总体关系．
1. Knowledge review 2. Graphical Features When selecting a chart, note the respective characteristics of the three charts. A bar chart uses height to represent the size of the data and can reflect the size relationship between the data. It can clearly show the specific number of each object. The line chart is a polyline that connects points that represent data at the corresponding time to represent changes in the data and can clearly reflect changes in things. The characteristic of the fan chart is to reflect the relationship between the part and the population.