the answer is f(x)=2x-1
where is the figure
pakistan's principal natural resources are arable land and water. about 25% of pakistan's agriculture accounts for about 21%  of gdp and employs about 43% of the labour force. in pakistan, the most agricultural province is punjab where wheat and cotton are the most grown.
constant of proportionality = 3 and the equation is c = 3p.
c = kp where c = amount of caffeine in mg., p = oz of pepsi and k is the constant of proportionality.
substituting the values given:
24 = 8k
k = 3.
the same value of k will be obtained if we substitute the other given values.