Note how the total adds up to 100%. Bar charts and line graphs can be combined. Climate graphs are an example of this. The x-axis shows the months of the year and there are two y-axes to show ...

Though his inventions -- bar graphs, line charts, and pie charts -- are used every day, his name is barely remembered. And ...

除了线图之外，出现 IELTS Writing Task One 的其他类型图表还包括饼图(pie chart)、表格(table)和柱状图(bar chart)，不过今次我只集中讨论line chart。