No, those words are not antonyms of each other.
No, "representative" means standing in for or symbolizing something, while "conserve" means to protect or preserve something. They aren't directly opposite in meaning.
The opposite of master is servant or apprentice.
The opposite of think would usually be act.The opposite of think (believe) could be doubt.The opposite motivation from think (use intellect) would be to feel (use emotion).
The opposite of lofty is low or humble.
The opposite of "view" is "conceal" or "hide."
The opposite of should is should not or shouldn't.
The opposite of conserve would be to squander or waste.
Conserve
the opposite of representative
The opposite of representative (typical) would be uncharacteristic, or different.(The opposite of representative democracy is direct democracy.)(The opposite status from a representative is the constituent, or person represented.)
The opposite of representative (typical) would be uncharacteristic, or different.(The opposite of representative democracy is direct democracy.)(The opposite status from a representative is the constituent, or person represented.)
representative
The opposite of expend (use) is to conserve, save, or husband.
conserve
nonrepresentative
dictator
unrepresentative
unrepresentative