If a demand curve is a straight line parallel to y- axis - it shows ______
more elastic demand
less elastic demand
perfectly inelastic demand
unitary elastic demand
An indifference curve is ________ to the origin.
plain
concave
convex
none of these
A slight changes in price causes an infinite change in demand is a situation.
unit elastic demand
perfectly elastic demand
perfect inelastic demand
The degree of responsiveness of demand for a commodity to a change in its price is called ___
elasticity of demand
increase in demand
expansion of demand
