A company is increasing production of math-brain protein bars at a rate of 200 cases per day. All cases produced can be sold. The daily demand function is given by :

p(x)=40(x/200)

where x is the number of cases produced and sold, and p is in dollars. If the daily production is 800 cases, then revenue is

1. decreasing
2. increasing

at a rate of ________ dollars per day.