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Being quite interested in obsolete electronics, Angus has purchased several electronic music synthesis modules dating from the early 1970s and is testing them to find out how they work. One module is a voltage-controlled amplifier (VCA) that changes the amplitude (loudness) of an audio signal by changing a control voltage into the VCA. All Angus knows is that the magnitude of the control voltage should be less than 5 volts. He sets the audio input signal to an amplitude of 1 volt, then measures the audio output amplitude for different control voltage values. The following table shows these data. Show the resulting data and trendline, with equation and R2 value, on the appropriate graph type (xy scatter, semilog or log–log) to make the data appear linear.
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