Sam the Chameleon really loves math. He uses math to help him find the bugs he likes to eat. When looking for a bug at a particular point, Sam moves along the x-axis to reach the point's x coordinate and then sticks out his long tongue (up or down) to reach the point's y coordinate.

Use this applet and click on any point to see Sam in action:

http://www.mste.uiuc.edu/pavel/java/chameleon/basic/index.htm

One day Sam decides he will use a math rule to help him choose which bugs to eat: he will always stick his tongue out 1 more unit than twice the distance that he walked to find the bug. [Sam always starts at (0, 0)].

- Name 3 points Sam could reach by following his rule.
- Name 3 points Sam could not reach by following his rule.
- Explain Sam’s rule using one or more equations.