Affine Coordinate Changes The graph of the function f(mx+b) is related to the graph of f(x) in interesting ways. Amplitude and Phase: First Order The tide in a harbor lags behind that of the open ocean, and is controlled by a first order linear equation. Bode and Nyquist plots illustrate the steady state and method of solution. Amplitude and Phase: Second Order I A spring drives sinusoidally a spr