Number the pixels in a 3x3 bitmap like this:

2 5 8

1 4 7

0 3 6

Draw a "+'" sign in a 3x3 grid like this:

.*.

***

.*.

The number representing that bitmap is given by N above.

Draw the equation below (by clicking on the "X" and selecting a color) to see the other bitmaps around the "+"

This file was created by Graphing Calculator 3.5.

Visit Pacific Tech to download the helper application to view and edit these equations live.