I need to know which ones are nonlinear or nonproportion

Nonlinear means that -- the graph isn't exactly the line. It's basically a "curve" like parabola.

Non-proportional means that --- the graph doesn't start from the origin point or doesn't start at (0,0).

( A ) is both linear and proportion.

( B ) is proportion BUT NOT LINEAR (It's curved.)

( C ) is linear and proportion.

( D ) Is linear BUT NOT PROPORTION (Doesn't start at (0,0) )

So ( B ) and ( D )