The specification will tell you most of the answers to these questions. The fun starts on page 50 – https://filestore.aqa.org.uk/resources/physics/specifications/AQA-8463-SP-2016.PDF
2. You may also find the BBC Bitesize website helpful also. https://www.bbc.co.uk/bitesize/guides/zwc7pbk/revision/1
- What does the gradient of a distance-time graph represent?
- How can you calculate the speed from a curved distance-time graph using a tangent?