Discussion
Why is an amplifier's frequency response usually plotted logarithmically on both axes?
Answer: D
A single pole falls at a constant number of decibels per octave, so on logarithmic axes it is a straight line and the whole response can be sketched from its break points. Gain is meaningful in any units, phase is plotted separately either way, and linear axes can represent any number. A coordinate system that turns the behaviour of interest into straight lines is worth adopting for that reason alone.
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