In a Certain Town the Annual Consumption, B, of Beef $$b = 35 - 0.4 t$$

In a certain town the annual consumption, b, of beef (in pounds per person) can be estimated by $$b = 35 - 0.4 t$$ where t is the number of years since 2010. What is the slope of the graph of this function? Write a sentence interpreting this value.

A) 35; The average consumption of beef in this town is decreasing by 35 pounds per person per year.
B) -0.4; The average consumption of beef in this town is increasing by 0.4 pounds per person per year.
C) 35; The average consumption of beef in this town is increasing by 35 pounds per person per year.
D) -0.4; The average consumption of beef in this town is decreasing by 0.4 pounds per person per year.