I bought several educational software CDs. Those educational software CDs are supposed to have a lot of graph files, because the programs need to load a lot of pictures and display them. Children like pictures. But I just could not find any pictures such as BMP or JPG from those CDs. The best explanation to this is that educational software developpers pack all graph files into the single file. When program needs a picture, then it extracts that picture from the compacted file and displays it. But I have no idea what kind of file format they use to compact graph files. Can you tell me what kind of file format software developers use to pack graph files? Thanks.

Without knowing what the CD's are that question is impossible to answer with any degree of accuracy.

Graphs? Like y = 2x + 4 ??

Maybe the program figures it out on the fly.

Are you sure that they aren't just in a compressed format? Like a proprietary .zip or .rar format, since all those resources probably take up quite a bit of space uncompressed, and .zip can maintain directory structures.

It could be a custom format. Like ender said, it might just store the equation and graph it at runtime.

The CD are "Reader Rabbit's Math Ages 6-9" and "jump start indergarten". You can find them in Amazon.com. Zip and rar are supposed to be good. But I never saw an education title uses them. This is why I started this thread.