WAEC - Economics (2007 - No. 12)
The demand for beans in bags is given by the function Q - 36 + 0.4P = 0.
Where P is price in naira and Q is quantity.
Find Q when P = 20 naira.
12 bags
24 bags
28 bags
30 bags
คำอธิบาย
Q - 36 + 0.4P = 0
Q = 36 - 0.4(20)
36 - 8 = 28