Question: Case 1    Car Manufacturers

The table below shows the number of cars and light-duty trucks sold by the top eight automakers in the first two months of 2010, compared to the same period of 2009.

Sales so far this year

Manufacturer                                 February 2010        February 2009

General Motors Corp.                            287242                252701

Ford Motor Company                            249514               185825

Chrysler LLC                                        141592                146207

Toyota Motorcycle Sales USA Inc.           198823              226870

American Honda Motor Co. Inc.                148150             142606

Nissan North America Inc.                     132761                 108133

Hyundai Motor America                          64507                  55133

Mazda Motor of America Inc.                  32748                   31821

1. Compare the total sales of the eight manufacturers and calculate the percentage of market owned by each company. Has there been a decrease or increase in the sales of 2010 with respect to the same period of 2009? (To do this, perform a Pie chart for each year separately, including the percentages of each Manufacturer and determines the changes you see).
2. Compare the percentage increase of each of the eight companies. What Significant changes occurred from 2009 to 2010? (For this, perform a graph of Bars comparative between the years to observe in it the variation).

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