To answer this question, we need to define two concepts: a Giffen good and a demand curve.

A Giffen good is a type of good that people buy more when price is higher and less when price is lower. Therefore, the quantity demanded for a Giffen good increases with price.

A demand curve is a graphical demonstration of the relationship between quantity demanded for a good and its price. A upward sloping demand curve implies that the quantity demanded increases with its price. A downward sloping demand curve implies that the quantity demanded declines with the price of the good.

In this case of Giffen good, since quantity demanded increases with its price, the demand curve is upward sloping.