Identify which of the following is a first-order linear ODE.
y′+xy2=0y' + xy^2 = 0y′+xy2=0
y′+sin(x)y=exy' + \sin(x)y = e^xy′+sin(x)y=ex
y′+ey=xy' + e^y = xy′+ey=x
yy′=xy y' = xyy′=x