Looks like a copy of the chart available here:

http://economix.blogs.nytimes.com/2009/08/27/sat-scores-and-...

That post created a lot of debate a couple of months ago which was summarized here:

http://www.marginalrevolution.com/marginalrevolution/2009/08...

The chart on that second page appears to show that "higher parental income predicts higher child income but only for biological children and not for adoptees."