动态数据图，静态数据图和流程地图是雅思写作小作文的重点，在2017年一年中出题概率均等，从而基本消除了预测带来的运气成分，更公平、准确的考察考生的写作能力。

　　今天北京环球教育于洋老师给大家分享的是动态数据图的解题思路，之后静态、流程地图会依次分享。

　　所谓动态图就是数据随着时间变化而变化的数据图表，分为：线、饼、柱、表四类，但四类图表的分析和写作的方法几乎一致，接下来看这个剑桥例题：

　　The three pie charts below show the changes in annual spending by a particular UK school in 1981, 1991 and 2001.

　　相信大家对这个题目并不陌生，但从本质上来讲，它就是线、柱和表格的变体：

　　通过观察不难发现，以上四种图表和真题中的饼状图如出一辙，只是呈现方式不同，那么在数据分析，尤其是总结部分也会呈现出不同。

　　首先，数据分析方法：

　　从上图中发现，我们可以按照总体趋势来分段：

　　TS，FE，I一段；R和OW一段

　　其次，分完段之后我们还要对段落的结构进行把握：

　　TS，FE，I一段中，我们可以先写TS（max）再写FE，最后是I（min）

　　R和OW一段中，先写R，再写OW

　　最后，总结部分我们可以分不同的图标类型来区分：

　　线：总体趋势

　　饼：上升和下降的对比

　　柱：最值，变化不同

　　表：最值+一直上升

　　当然我们还有其他数据分析方法，对数据类型进行分类。

　　附考官范文：

　　The charts show how much a UK school spent on different running costs in three separate years: 1981, 1991 and 2001.

　　In all three years, the greatest expenditure was on staff salaries. But while other workers' salaries saw a fall from 28% in 1981 to only 15% of spending in 2001, teachers' pay remained the biggest cost, reaching 50% of total spending in 1991 and ending at 45% in 2001.

　　Expenditure on resources such as books had increased to 20% by 1991 before decreasing to only 9% by the end of the period. In contrast, the cost of furniture and equipment saw an opposite trend. This cost decreased to only 5% of total expenditure in 1991 but rose dramatically in 2001 when it represented 23% of the school budget. Similarly, the cost of insurance saw a rising trend, growing from only 2% to 8% by 2001.

　　Overall, teachers' salaries constituted the largest cost to the school, and while spending increased dramatically for equipment and insurance, there were corresponding drops in expenditure on things such as books and on other workers' salaries.