I have a Lab Report on Centripetal Force

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Homework Statement
I am writing up a lab report on Centripetal force. One thing I have to do is graph Force vs 1/(Period squared). What would be the unit of the slope of this graph?
Relevant Equations
The force is in Newtons and the Period is in seconds.
scatter-plot (5).png
 
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Take the equation that you are plotting.
Replace ##F## with ##y##,
Replace ##\dfrac{1}{T^2}## with ##x##.
It should now look like ##y=\text{something}*x##. The slope is something. What are its units?
 
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