The Consumption of Beef, C (In Pounds Per Week Per $\partial f / \partial p$

Multiple Choice

The consumption of beef, C (in pounds per week per household) is given by the function C = f(I, p) , where I is the household income in thousands of dollars per year, and p is the price of beef in dollars per pound. Do you expect $\partial f / \partial p$ to be positive or negative?

A) Negative
B) Positive