A Multiple regression Model 371 Time Figure 1. Solution to a generic logistic equation, y'= ay- by with population plotted as a function of time Time Figure 2. The derivative of the solution to a generic the logistic equation, showing the time rate of change of population. The peak corresponds to Dreissena breeding season in our model.A Multiple Regression Model 371 Population Time Figure 1. Solution to a generic logistic equation, y
= ay − by2, with population plotted as a function of time. Growth Rate Time Figure 2. The derivative of the solution to a generic the logistic equation, showing the time rate of change of population. The peak corresponds to Dreissena breeding season in our model