The graph below shows changes in global food and oil prices between 2000 and 2011.
Here are my first two paragraphs, the introduction and overview:
The line graph compares the average price of a barrel of oil with the food price index over a period of 11 years.
It is clear that average global prices of both food and oil rose considerably between 2000 and 2011, although many price fluctuations can be seen during those 11 years. Furthermore, the trends for both commodities are very similar, and so a strong correlation is suggested.