I'm doing a lab assessment for Coulped Pendula, I was told that frequency is an important aspect of the results. I wanted to ask how I'm suppose to use these results below of In Phase, Out of Phase and Beat Phase to make a linear relationship in regards to Frequency. Also what do the number of peaks in the Amplitude Frequency graphs indicate?

tk Live voltage read out will freeze while recording data. Channel can not be changed during reading. Voltage 0 plotted in black, voltage 1 plotted in red. Current save directory: C:/Users/25416320/Desktop Voltage 0: 0.00 V Channel: Select directory 0-1- Voltage 1: 0.00 V Channel: 2-3 Preset read duration: 1.0 minutes Time: 60.04 Start Save data Data: 14080 Voltage (V) Amplitude 0.10 0.05 0.00 -0.05 -0.10 0.08 0.06 0.04 0.02 10 20 30 40 50 60 Time (s) 0.00 2 4 6 8 10 Frequency (Hz)