Consider a declining population following the formula
b(t) = l / 1 + t
(measured in millions). Approximate the population at each of the following times using the tangent with base point t = 0, the tangent with base point t = 1, and the secant connecting times t = 0 and t = 1. Graph each of the relevant tangents and secants. Which method is best for what?
t = 0.9.