Editing Utility maximization problem (section)

=== 4) Check for negativity ===
[[File:Utility_maximising_bundle_when_demand_is_negative.png|thumb|Figure 1: This represents where the utility maximizing bundle is when the demand for one good is negative]]
Negativity must be checked for as the utility maximization problem can give an answer where the optimal demand of a good is negative, which in reality is not possible as this is outside the domain. If the demand for one good is negative, the optimal consumption bundle will be where 0 of this good is consumed and all income is spent on the other good (a corner solution). See figure 1 for an example when the demand for good x is negative.