Option A. is a function...
here For different values of x in Domain of(x,y) ;There is a unique image y in codomain.
All others have more than one image for a single value x.
Hope it helps...
Regards;
Leukoniv/Olegion.
I think you can put bench mark place valie round tenth thousnadth
Answer: 
Step-by-step explanation:
By the exterior angle theorem,

Answer:
3x2(4x – 3) + 1(4x – 3) ,':)
Step-by-step explanation: