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Homework Statement
[itex]\frac{dy}{dt}=r(1-\frac{y}{K})y[/itex]
Homework Equations
The Attempt at a Solution
[itex]0=r(1-\frac{y}{K})y[/itex]
y=0 and K.
Plotting dy/dt vs y, the intercepts would then be (0,0) and (0,K).
The book says "the vertex of the parabola is (K/2, rK/4)." Is this something from algebra that I'm forgetting? How do I know/find this?