demand curve
noun[C,usually singular]
ukusECONOMICS,GRAPHS & CHARTS
therelationship, asshownby alineon agraph, between thepriceofgoodsorservicesand theamountorquantitythatpeoplebuyduring aparticularperiodoftime:
It isgenerallyassumedthat thedemandcurveisdownwardsloping: aspricesgo up,demandgoes down.