You are welcome to answer questions posted in the Ask a Teacher forum as long as your suggestions, help, and advice reflect a good understanding of the English language. If you are not a teacher, you will need to state that clearly at the top of your post. Please note, all posts are moderated by our in-house language experts, so make sure your suggestions, help, and advice house the kind of information an international language teacher would offer. If not, and your posts do not contribute to the topic in a positive way, they will be subject to deletion.
If you're describing a chart, be clear on the aim of the chart- what is it trying to show? Who is it for? Is it comparing something over time? If so, what has the trend been over the period? Is it comparing different things, like products, companies, etc? If so, what do we learn about them from the comparision?
chart describing! 
Linear Mode
