Basically the report should consist of
1. An introduction
2. A discussion of the method
3. A discussion of the results you found from the survey
4. A conclusion
The total report is 500 words. Most of the report will be a discussion of the results and graphs which you made from the results.
So a suggested word count might be
1. Introduction- 75 - 100 words
2 Method - 75-100 words
3 Results- 100-250 words
4. Conclusion- 75-100 words
1. The introduction
The post below is an example of an introduction for the report on your survey.
Sentence 1- a general statement about the topic
Sentences 2 and 3- background information about the topic
Sentence 4- The purpose or aim of the survey (basically the title)
Sentence 5- talks about your survey and includes some of the questions you asked.
Sentence 6- is about the structure of the report.
This is an example, you don't have to follow it exactly, but it may help in writing your introduction.