Here is a suggested outline for writing an IELTS line graph report:

Introduction:

a. Paraphrase the task: Begin by paraphrasing the given task statement or question.

b. Provide an overview of the graph: Give a brief overview of the main trends or patterns depicted in the line graph.

Overview paragraph:

a. Summarize the main features: Provide a general summary of the main trends or patterns observed in the graph.

b. Include the time frame: Mention the time period covered by the data presented in the line graph.

Body paragraphs:

a. Start with a general statement: Begin each body paragraph with a general statement summarizing the main trend or pattern for a specific line or data set.

b. Provide specific details: Present specific data or figures from the graph to support your statements.

c. Analyze the data: Discuss the significant changes, fluctuations, or key points within each line or data set.

d. Compare and contrast: Identify any notable similarities or differences between different lines or data sets.

Additional observations:

a. Highlight significant points: Discuss any significant peaks, valleys, or turning points in the graph.

b. Explain possible reasons: Offer explanations or reasons behind the observed trends or patterns.

c. Mention any outliers or exceptions: Address any unusual or unexpected data points that deviate from the overall trend.

Conclusion:

a. Summarize the main trends: Provide a concise summary of the main trends or patterns discussed in the body paragraphs.

b. Restate the significance: Emphasize the importance or implications of the data presented in the line graph.

Remember to use appropriate language, such as comparatives, superlatives, and accurate descriptions of data trends. Utilize a mix of simple and complex sentences, and pay attention to your grammar, vocabulary, and cohesion.