The graph below shows changes in global food and oil prices between 2000 and 2011.
The line graph illustrates the oscillation in the cost of food and oil on global scale over the course of 11 years starting from 2000.
Looking at the graph, it is immediately obvious that both food and oil price index witnessed wild fluctuations throughout the period shown. Furthermore, the trends for both commodities were roughly similar. The correlation in this research is 93.6%.
In 2000, the average price of oil per one barrel stood at around 30$. The price index increased gradually over the first 7 years, rose to approximately 50$ per barrel in 2007. However, in the next year, this figure skyrocketed to over 130$ in mid-2008, making it the highest price ever. Interestingly, the number then in just 6 months dip to well over 40$ in 2009, before surging to under 100$ at the end of the period.
The same pattern was observed in food price index. In 2000, only 90 points were seen in cost index. The figures went up dramatically to 220 points in mid-2008 before plummeted to 140 in the first quarter of 2009. Same trend with oil price, the number soared and reached its peak of 240 points in 2011.
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0llalkjkdoscillation
Oscillation is a very specific type of variation. It is the motion of a string on a violin or a weight on a spring.
Here is what oscillation (undamped and damped) looks like. Is that the same as the curves on the graph you are describing?
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