Suppose your tastes can be represented by the utility function ( U(x) = 3x² + 2x + 1. ) Your demand function for ( x ) is:
a) ( Q_d = 6x + 2 )
b) ( Q_d = 3x² + 2x + 1 )
c) ( Q_d = 2x + 3 )
d) ( Q_d = x² + 4x )