For a function to be decreasing over an interval, the outputs on the function are getting smaller as the inputs of the function are getting larger, but the outputs could be positive or negative. For a function to be negative over an interval, the outputs must be negative, while the inputs could be positive or negative.
The answer is 6 square inches because if you turn 1 and 1/2 into 3/2 you can then turn 4 into 4/1 which also turns to 8/2 so that times 3/2 = 12/2 which turns to 6/1 which is 6
