Each individual reaches a decision--each individual has an income point and decides how much to consume based on the budget constraint.

在预算限制内,每个人都要决定将收入的多少,用于消费

耶鲁公开课 - 金融市场课程节选

The budget constraint is a straight line through this point with a slope of .

这个预算限制在这幅图上是一条,是一条经过该点并以为斜率的直线

耶鲁公开课 - 金融市场课程节选