Well, its kind of obivious that 2x + 4 stands out, but I think you are asking why. Whereas all other lines shown are vertical or horizontal, 2x+4 is diagonal.
Answer:
I think "A" for the first one
Answer:
2a^2b^3 ^3squareroot4a
Step-by-step explanation:
Variables: x and y
Coefficients: 5 and 2
Constants: 4
Exponents: 2 (if 3y is being squared)