Exercise :: Bar Charts  Bar Chart 11
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Study the bar chart and answer the questions.
Sale of Cellular Phones
1.  The difference in the sales of cellular phones for the years 1997 and 1999 is ? 

Answer: Option D Explanation: The required answer is got by 48,000  30,000 = 18,000.

2.  The two years between which the rate of change of cellular phones is minimum are ? 

Answer: Option C Explanation: The lowest rate of change for For year 1997 and 1998 = ((48000  40000) / 40000) x 100 = 20% For year 1999 and 2000 = ((30000  25000) / 25000) x 100 = 20% is exhibited by both option (A) and (B). 
3.  The sum of sales of cellular phones in the years 1999 and 2001 is equal to that in ? 

Answer: Option A Explanation: The sum of sales in the two years is 30,000 + 18,000 = 48,000, which is the sales value for 1997.

4.  The percentage increases in sales from 2001 to 2002 was ? 

Answer: Option C Explanation: The percentage increase exhibited is ((40  18)/18) x 100 = 122 % approximately. 