The best of the given data is that of January in which the expenses almost equal the earnings. f(x)= g(x)
Imports means buying and bringing in the purchases from the outside or another country.
When imports increase , expenses increase.
Exports means selling and sending out the goods to an another country.
When exports increase , earnings or profit increases.
Now looking at the data
January: the number of imports is equal to the number of exports, which means the amount spent is equal to the amount earned or almost the same.
f(x)= g(x)
February : the number of imports is greater than the number of exports,
6 > 4 which means the amount spent is greater to the amount earned.
f(x)> g(x)
March: the number of imports is greater than twice the number of exports,
9 > 5 which means the amount spent is greater than twice to the amount earned.
f(x)> g(x)
April: the number of imports is twice greater the number of exports,
12 > 6 which means the amount spent is twice greater than the amount earned.
f(x)= 2g(x)
So the best of the given data is that of January in which the expenses almost equal the earnings.
f(x)= g(x)
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