## Prepare a Presentation

## Work Time

# Prepare a Presentation

- Explain how the Number Line Contraption works.
- Use diagrams to explain your thinking.
- Represent the action mathematically using numbers and then again using a variable.
- Make sure you include the terms
*positive*,*negative*,*integer*, and*rational number*in your presentation.

# Challenge Problem

Can the dot start on a negative number and then land on another negative number? Explain your thinking.

- Use the Number Line Contraption interactive to test what happens if you swing the lever twice.
- Use a negative sign to represent each swing of the lever.
- Use
*a*to represent any number.