Determine if each function is linear or nonlinear.

Options.....

Ay=2x^3
By=x+5
Cy=Square root of x-3
D5x+5y=25
Ey=x^2/2

On option E ... it is a fraction....

PLEASE HELP!!!

Verified Answer :

Ay=2x^3 ----------nonlinear

B. y=x+5 ..........
linear 

C. y=Square root of x-3 
----------nonlinear

D. 5x+5y=25
..........linear 

E. y=x^2/2 
----------nonlinear