In practice, bar charts are used occasionally to summarize a numerical variable over time, which can be handy. The bar chart below shows the inflation rate based on the Consumer Price Index in India. For each month, inflation rate is grouped by product class, and class rectangle heights are based on the percentage the product group contributed to inflation rate.
a) What is the inflation rate for September 2014?
b) Which product group consistently has the highest impact on inflation rate?
c) Which product group consistently has the least impact on inflation rate?
d) During what month and year does it seem that the Miscellaneous product group accounted for the biggest percentage of the inflation rate?

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9.00-8.60 8.25 8.48-8.33- 8.00- 7.00- 6.00- 5.00- 4.00- 3.00- 2.00- 1.00- 0.00+ Group wise breakup of general inflation rates based on CPI (combined) Food and beverages Pan, tobacco and Intoxicants Clothing and footwear Housing Fuel and light Miscellaneous Jan-14 7.88 Feb-14 Mar-14 6.77 Apr-14 May-14 Jun-14 7.39 Jul-14 7.03 5.63. 4.62- 3.27 4.28 5.10 5.37 525 Jan-15 5.01 4.57 5.40 May-15 Jun-15 3.69 3.74 4.42 Jul-15 Aug-15 Sep-15