L = 25 (slider from 1 to 60, step 1)
b = 7 (slider from 0 to 40, step 0.5)
k = 0.15 (slider from 0 to 0.2, step 0.01)
M: y = L
P(x) = L / (1 + (b * ℯ^(((-k) * x))))
I: (0, P(0))
slopefield1 = SlopeField(((b / 1000 * y) * (L - y)), 20)
f = SolveODE((b / 1000 * (y * (L - y))), (0, 6))