C. If you have to add on a number it is nonproportional
Answer
F(0)=0
I can put the work in the comments if you need it :)
Can you post what it says? I could probably help you out.
1 foot = 12 inches
(1 foot)³ = (12 inches)³
12³ = 1,728 in³
To change 10 cubic feet into cubic inches
10 ft³ * 1728 in³/ft³ = 17,280 in³ Choice C. Multiply by 1,728