Set the menus at the top to Exploration, Six Chairs, and Rectangle.

- Using only the
**Length** buttons, adjust the size of the arrangement. How do the number of chairs change with each increase in length?
- Using only the
**Width** buttons, adjust the size of the arrangement. How do the number of chairs change with each increase in width?

What pattern exists between the number of tables and the number of
chairs? Describe a rule for the number of chairs based on what you
observed.

- How many chairs are needed for a 10 × 5 arrangement?
- How many chairs are needed for a 13 × 8 arrangement?
- How many chairs are needed for an
*m* × *n* arrangement?