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anushridi
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1. We are given a table and asked to find which statements are true, and which are false.

2. The commodities with the three lowest index values in September 2012 all showed percentage decreases from October 2011 to October 2012. Consumer goods, excluding automotives is a commodity that has the second lowest index value in September 2012, however, it showed a 0.2 percent annual increase. So, the statement is false.

3. The commodity with the greatest percent change from June 2012 to July 2012 also had the greatest percent increase from July 2012 to August 2012. Natural gas had the greatest percent change from June to July, however, crude oil had the greatest percent change from July to August. So, the statement is false.
Hi isnt a growth of 0.2 on 100 account to 98 which is a DECREASE?
Or should we see the positive values as 1.02? which will give 102?


Also what about the negative changes?
what will -1.2 indicate??
100 will change to ??
Good question! It's a little bit tough to understand the percent changes on the graph. This is how I understand it:

A "-" means a decrease and nothing is a "+", which is an increase. If it's a decrease in x% then we multiply the number by 1-x%. If it's an increase then we multiply the number by 1+x%.

Let's look at your examples (start with 100). 0.2 percent change: \(100 \rightarrow 100 * (1 + 0.2\%) = 100 + 20 = 120\). -1.2 percent change: \(100 \rightarrow 100 * (1 - 1.2\%) = 100 - 12 = 88\).

I hope that answered your question!
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