The relationship is modeled by the equation y = 7.7079x - 7.
Here, y is the dependent variable which is the Earth Mass, and x is the independent variable which is the Earth Radius.
Solving for the Earth Mass if Earth Radius is 3.2 (x=3.2), we substitute 3.2 to x.
7.7079(3.2)-7
=7.7079 times 3.2 -7
=24.66528-7
=17.66528
7.7079(3.2)-7=17.66528