Which differential equation has the general solution y=Ce−4xy = Ce^{-4x}y=Ce−4x?
y′=4yy' = 4yy′=4y
y′=−4yy' = -4yy′=−4y
y′=−4xy' = -4xy′=−4x
y′=e−4xy' = e^{-4x}y′=e−4x