The Engel curve for a Giffen good is. negatively sloped positively sloped vertical horizontal

The Engel curve for a Giffen good is negatively sloped.

Here's why:

1. A Giffen good is a type of inferior good. Inferior goods are those for which demand decreases as income increases.

2. The Engel curve describes how a consumer's demand for a good changes as their income changes.

3. For most goods, as income increases, demand also increases, so the Engel curve is positively sloped.

4. However, for a Giffen good, as income increases, demand decreases. This means the Engel curve for a Giffen good is negatively sloped.

5. This negative slope represents the unique behavior of Giffen goods, where an increase in price actually leads to an increase in quantity demanded, contrary to the law of demand.