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
Change in the demand of apples due to increase in its price is its ____ demand.
contraction
extension
increase
decrease
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
none of these
An indifference curve is ________ to the origin.
plain
concave
convex
