在雅思写作中，线图（Line Graph）是Task 1中常见的图表类型，用于展示数据随时间或其他变量的变化趋势。以下是写作线图的步骤和要点：

开头

简要介绍图表的基本信息，如时间、地点、研究对象。可以用一句话概括整体趋势。

中间段落

按照时间顺序描述曲线的变化。

指出重要的数据点，如最高点、最低点或转折点。

使用关键词汇描述趋势，如上升（rise, go up, increase）、下降（drop, decline, decrease）。

描述峰值（peak）、谷值（bottom）等关键数据点。

注意数据点之间的比较关系，如倍数或分数关系。

结尾段落

总结最重要的趋势或特征。

可以再次强调图表中的关键数据点。

关键词汇和短语

描述趋势：rise, go up, increase, drop, decline, decrease

描述最高点：peak, highest point, a high point at

描述最低点：bottom, lowest point

描述转折点：turning point, intersection

描述起始和终点：starting point, ending point

示例结构

Introduction

This line graph illustrates the average monthly sales figures for a retail company over a five-year period.

Body Paragraph 1

The sales figures were relatively stable in the first two years, with a slight increase of about 5% each year.

In the third year, there was a significant rise of 12%, reaching a peak of $500,000.

The fourth year saw a decline of 8%, and the fifth year returned to the previous level of $450,000.

Body Paragraph 2

The data suggests that the company's sales experienced a temporary surge in the third year, likely due to a new marketing campaign.

The subsequent drop in sales in the fourth year could be attributed to increased competition or a shift in consumer preferences.

Conclusion

Overall, the line graph highlights the company's fluctuating sales performance over the five-year period, with a notable peak in the third year followed by a decline in the fourth year.

通过以上步骤和要点，你可以清晰地描述线图中的数据变化，使文章结构清晰、逻辑连贯，从而提高写作得分。