## Prepare a Presentation

## Work Time

# Prepare a Presentation

- Explain how you calculated the rates.
- Explain why it is important to use measurement units with your rates.
- Identify any mistakes you made and what you learned from them.
- Describe what you found most difficult about calculating rates.

# Challenge Problem

Karen ran for 46 min. At the end of 45 min, her total distance was 3.75 mi. At the end of 46 min, her total distance was 3.85 mi.

- Compare Karen’s average speed during the last minute of her run to her average speed during the first 45 min.
- Did Karen run the last minute faster, slower, or at the same speed? Justify your answer mathematically.