If a Consumer Purchases Two Goods, Food (Measured Along The x

Multiple Choice

If a consumer purchases two goods, food (measured along the $x$ axis) and housing (measured along the $y$ axis) , and if the price of food is $\$ 3$ per unit and the price of housing is $\$ 400$ per unit, then what is the slope of the consumer's budget constraint if the consumer has an income of $\$ 600$ ?

A) $- 3 / 600$ .
B) $- 3 / 400$
C) $- 400 / 600$
D) $- 400 / 3$