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Determine which differential equation corresponds to each phase line. You should be able to state briefly how you know your choices are correct.

$\frac{dy}{dt}=y^3-4y$

$\frac{dy}{dt}=y(y-2)$

$\frac{dy}{dt}=3y-y^2$

A B C D

$4.$

$\frac{dy}{dt}=y(2-y{)}^2$

$\frac{dy}{dt}=4y-y^3$

$\frac{dy}{dt}=y^2-3y$

$\frac{dy}{dt}=2y-y^2$

$\frac{dy}{dt}=y^2|y-2|$