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## Homework Statement

Calculate the Moon's Synodic Period

## Homework Equations

N/A

## The Attempt at a Solution

I am supposed to plot a graph of Time(y-axis) against Phase (x-axis), where phases is not a sin curve but a straight line, because we are adding upwards, ie from a new moon to ful is from 1/8 -> 8/8, then it goes back down, but the phase plotted continues to go up, from 1 1/8 -> 2, and so on, giving a nice straight line. Now we are supposed to plot a straight line through the data, which I have done in Excel, and it has given me a gradient of 0.0713.

Can anyone give me any clues how you are supposed to get the period from this?

Thanks in advanced,

TFM