The amount of defects is not the independent value since you can not choose how many are defects, the independent variable would be the amount of bread made.
G(x)
You just plug 2 in for x in all four equations & see what one comes out to 32!
3 (had to feel the space with words)
Answer:

Step-by-step explanation:
Volume formula for rectangular prism is 
Volume = length * width * height


Hope this helps