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## Homework Statement

I am told to find the mass of Saturn using Kepler's Laws and the following information on Saturn's moons:

Mimas

r = 185.52 x 106

t = 8.14 x 104

Enceladus

r = 238.02 x 106

t = 11.839 x 104

Tethys

r = 294.66 x 106

t = 16.311 x 104

Dione

r = 377.4 x 106

t = 23.647 x 104

Rhea

r = 527.04 x 106

t = 39.031 x 104

## Homework Equations

T^2 = (4pi^2/G*M)*r^3

## The Attempt at a Solution

So plotting the information on the moons I get a slope of 2E-24x + 320.16. But I'm not really sure where to go from here. Why was it important for me to find the slope in order to find M? Can't I just find M via M = (4pi^2/GT^2)r^3?