The Washington Post: What do falling oil prices mean for the U.S. in the short and long term?
Article published: Feb 14, 2015 – out of date: no longer suitable for your IB Economics commentary
IB Economics syllabus: Microeconomics
A bit longish article but provides a great analysis of how the U.S. economy is influenced by the low oil prices. The only shortcoming is that it leaves little room for further analysis, so my suggestion is to look for another article on this topic and then use this article to guide your commentary.
Source of image: Eric Gay, AP