compute area under a graph??

Hi all!
I have a graph composed of many simple straight lines.
How can I compute the area under the graph?

Thanks a lot
alvarenga

well it depends on the data the graph is drawn from, can you post the data?

between each 2 observations the area is both the Ys multiplied by the distance between the x values divided by 2, this can easily be replicated for each point on the graph

Regards

Dav

Hi! that is exactly it!
Thanks a lot for your answer Dav : )