The table below shows the quantity of yams (in kg) produced by four yam producing states in Nigeria between 1995 and 1998;
Quantity of yams in kilograms produced between 1995 and 1998
State
1995
1996
1997
1998
ABCD
300,000500,000600,000700,000
400,000500,000700,000600,000
500,000600,000800,000500,000
600,000700,000800,000400,000
Use the table to answer the following questions (a) Calculate the total quantity of yams produced in the four states during the period (1995-1998) (b) Construct a pie-chart to show the quantity of yarns produced by each state in 1998 (c) State two advantages of a pie-chart
Explanation
(a) Total for A = 1,800,000 i.e adding the years together Total for B = 2,300,000 Total for C = 2,900,000 Total for D = 2,200,000 Grand Total = 9,200,000 State Quantity 1998 production A = 600,000 B = 700,000 C = 800,000 D = 400,000 2,500,000 State A 600,000 = 600,000 x 360° = 6 x 360 = 432 = 86.4° 2,500,000 25 5 State B 700,000 = 700,000 x 360° = 2.520 = 504 = 100.8° 2,500,000 25 5 State C 800,000 = 800,000 x 360° = 8 x 360 = 2,880 = 576 = 115.2 2,500,000 25 25 5 State D 400,000 = 400,000 x 360° = 1440 = 57.6° 2,500,000 25 5
