[TorKlingberg]

This graph is very confusing. On the X-axis are dates, and on the Y-axis are some unspecified numbers, perhaps price.

[egonzalez]

X-axis = dates (Jan 1st - Dec 31st)

Y-axis = price

[TorKlingberg]

So all the On-Demand instances were free on Jan 10, and have been getting more expensive linearly since then? I doubt it.

[egonzalez]

If you zoom in to see Jan 10th 2010 you will see the following prices

http://twitpic.com/1m6vxi

[colonel_j]

So x-axis is actually days of usage, not absolute dates

[egonzalez]

Correct day 1 to day 365.