The page rank of a web page can be seen in the Google page rank bar on the Google Toolbar. It actually takes 10 links to reach PR1, and then a lot more to reach 2 and up. That's not it, because it also depends on the Page Rank of the page that will be linking to your page. Nobody knows the exact formula Google uses to determine your page rank, but there are ways to improve your rank and thus build your business through more traffic to your site.