IELTS Academic Writing Task 1 - the graph

In the IELTS exam most of the questions ask you to describe information shown in graphs, tables or charts.  You are not expected to analyse the information or come to any conclusions.  However, you are expected to choose the most significant data to write about, and compare it with the other data shown.

Sometimes you are given a diagram instead of a graph and you need to describe the diagram.  This may show a process, so you need to describe the various stages that are shown, or how something works.  Or the diagram may show past, present or future stages of a situation.  Again you need to describe and compare the different stages.

IELTS practice exams and exercises

Holmesglen Institute of TAFE provide some excellent practice and advice

Over 50 Task 1 graphs and sample answers!

How to answer the Task 1 question
As you prepare for this part of the IELTS exam you need to look at the following areas to help you write an appropriate answer:
-  Vocabulary 
Learning from examples

Australia Network has produced an IELTS exam TV series! 
Each episode is about 10 minutes long and focuses on various parts of the test, as well as grammar and vocabulary. I've used some of these programs with my IELTS class because I think they're so good! For Writing take a look at Series 1 and 2.