Feasible Region

Me: "When we graph an inequality, what does this shaded part of the graph mean?"
Student: "Those are the points that make the inequality is true."
Me: "Who remembers what we called that area the other day?"
Other student: "Feasible region."
N. (yes, the same N. whose mom I met with last week): "Feasible... Feeeasible... I like that word.

Later in the period, something surprised N. His reaction: "What the feasible?!"

Hehe.