A consumers income can affect their demand for most goods, fornormal goods if the consumers income increases then there is ademand for more normal good, but a fall in income would cause ashift to the left for the demand curve, this shift is called adecrease in command. For inferior goods, an increase in incomecauses demand for these goods to fall, inferior goods are goodsthat you would buy in smaller quantities, or not at all, if yourincome were to rise and you could afford something better.