Hi, I would really appreciate anyone helping me to answer this question with the best possible explanation. Thank you in advance.

1. Below is a plot of the FTSE 100 Index and the GBP/USD exchange rate for the year from March 2016 to March 2017: 7,500 1.55 7,000 1.50 6,500 1.45 1.40 6,000 1.35 -FTSE 100 5,500 1.30 Sterling 5,000 1.25 4,500 1.20 09 Jul 16 09 Apr 16 09 Mar 17 - 09 Mar 16 09 Oct 16 09 Jun 16 09 Aug 16 09 Sep 16 09 Jan 17 09 May 16 09 Nov 16 09 Dec 16 09 Feb 17 What do you think is going on in the graph and how might you explain it