How was that price determined? I'm not sure because I couldn't find an explanation of the pricing mechanism. Since the value of anything is whatever people are willing to pay for it, I imagine there are bitcoin traders scattered throughout the world exchanging their hard-earned bitcoins for various national currencies. These people -- maybe they are robots -- are setting the price.
Here is a chart of bitcoin prices since December 2012. The peak was $1145 on 30 November 2013. It's been a long downhill slide since then.
I'll continue to research the pricing mechanism and will report any findings in a future post.