If the consumer wants to buy \({x_1}\) units of item 1 and \({x_2}\) units of item 2 and the prices of the two items are \({p_1}\)and \({p_2}\) respectively, and M is the income of the consumer, then \({p_{1x1}}\) + \({p_{2x2}}\) ≤ M is called the consumer's _______ .

If the consumer wants to buy \({x_1}\) units of item 1 and \({x_2}\)�

1.	If the consumer wants to buy \({x_1}\) units of item 1 and \({x_2}\) units of item 2 and the prices of the two items are \({p_1}\)and \({p_2}\) respectively, and M is the income of the consumer, then \({p_{1x1}}\) + \({p_{2x2}}\) ≤ M is called the consumer's _______ .
A.	Demand graph
B.	Utility function
C.	Budget constraint
D.	Indifference curve
Answer» D. Indifference curve