The previous question I answered was exactly like this.
6(4) - 2(6) = 12.
K = 4.
SOLUTION
Given the question on the question tab;

The trace on the graph is given below;

Final answer:
The volume of the box when x=1 is 15 cubic inches.
I think it would be 2 because it looks like 6 is the total and 3 is a side number so if you were to multiply 3 times 2 it would be 6. I hope this is correct!
Answer:
Its not that hard think hard 3