When analyzing the relationship between consumer income and the demand for goods, it's essential to understand the distinction between normal goods and inferior goods. Craft beer is classified as a normal good, which means that its demand is directly influenced by changes in consumer income.

When consumer income rises, the demand for normal goods, such as craft beer, increases. This is represented graphically by a rightward shift of the demand curve. For instance, if we label the initial demand curve as D1 and the new demand curve after the income increase as D2, the shift indicates that at the same price level, consumers are willing to purchase a higher quantity of craft beer. This can be illustrated on a graph with price on the y-axis and quantity on the x-axis, where the increase in income leads to a higher quantity demanded at the same price point.

Conversely, when consumer income decreases, the demand for normal goods declines. In this scenario, the demand curve shifts to the left, indicating a decrease in the quantity demanded at the same price. Again, using the demand curves, the original demand curve D1 would shift to a new position D2, reflecting that consumers are now purchasing less craft beer due to reduced income.

In summary, for normal goods like craft beer, an increase in consumer income results in a rightward shift in demand, leading to higher quantities demanded at the same price, while a decrease in income causes a leftward shift, resulting in lower quantities demanded at the same price. Understanding these dynamics is crucial for analyzing market behavior and consumer choices.