A demand curve relates, for a given market: a) Price and quantity b) Price and time c) Demand and supply d) Price and elasticity

With my colleagues

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Price and Quantity. Price and Quantity demanded are inversely  related. 

Vinod  jetley  answer is correct ,,A demand curve related Price and quantity,,

a) Price and quantity

Price is generally shown on the vertical axis and quantity on the horizontal axis. The demand curve typically shows that as price falls, quantity demanded increases.

a) Price and quantity

is the answer