What is burndown chart in agile?

Related questions

1. Do you need a Scrum Master?
2. What is agile in simple terms?
3. Which is better agile or waterfall?
4. What is the difference between waterfall and agile?
5. What is Sprint in SDLC?
6. What are principles of agile?
7. What is burndown chart in Sprint?
8. Why Agile methodology is better?
9. What is the main role of a scrum master?
10. What are the disadvantages of agile?

Tags

1. #versus
2. #outstanding
3. #graphical
4. #often
5. #vertical
6. #predicting
7. #representation
8. #useful
9. #backlog
10. #along
11. #horizontal
12. #completed
13. #chart