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 ?

A. 500 units
B.

1,000 units

C.

5,000 units

D.

18,000 units


2. 

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

A. 1997 and 1998
B.

1999 and 2000

C.

Both option (A) and (B)

D.

2001 and 2002


3. 

The sum of sales of cellular phones in the years 1999 and 2001 is equal to that in ?

A. 1997
B.

1998

C.

2000

D.

2002


4. 

The percentage increases in sales from 2001 to 2002 was ?

A. 115 %
B.

128 %

C.

122 %

D.

118 %