Answer:
negative, since to purchase more of one good means giving up some of the other good
Step-by-step explanation:
Budget Line shows combination of two goods that a consumer can consume, given prices & income.
Equation : p1x1 + p2x2 = m ;
It is a downward sloping line, because given same money income & prices - if consumer has to increase consumption of one good, he/ she can consume lesser of the other good. So, there is negative relationship between two goods & hence the budget line is downward sloping.