Iam trying to do my math homework, but i have never used delta before and i don't understand how to use it properly. i need to show my work, so if anybody can me i would be . you

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Which of these tables represents a non-linear function?