You have done your delivery plan, so you now have a plan. You know when you are starting the first iteration, when you are starting the next one and the final one, and when you are delivering, therefore you can draw your chart. You can provide a chart that reflects that plan. We expect to see a line chart, not a bar chart. line charts are very easy to visualize because you can see the trend. You have one line, which shows the plan and another line that shows your progress