If y=e3xy = e^{3x}y=e3x is a solution to y′=kyy' = kyy′=ky, what is the value of kkk?
k=1k = 1k=1
k=3k = 3k=3
k=e3xk = e^{3x}k=e3x
k=1/3k = 1/3k=1/3