A landscaper puts 3 fish into a new pond. Two months later there are 27 fish in the pond. Write a linear function ( g(x) = mx + b ) to model the number of fish in the pond after ( x ) months.
a) ( g(x) = 12x + 3 )
b) ( g(x) = 6x + 3 )
c) ( g(x) = 9x + 3 )
d) ( g(x) = 3x + 9 )