#linearandquadraticgraph#graphofquadraticequation#positiveandnegativevaluesofannshapedquadraticgraph#increasinganddecreasingvaluesofannshapedquadraticgraph#equationoflineofsymmetry#maximumandminimumvaluesofaquadraticgraph#turningpointofaqudraticgraph#natureofquadraticgraph#profitcurve#marginalcostcurve#averagecostcurve#profitfunction