Please help me with this. It looks long, but it really is not.

A physics student wants to determine the relationship between the radius of a charged conducting sphere and the magnitude of the surface charge. The student suspects a relation of

V=(kq)/(r^n)

Assume that the voltage is held constant at 10V, and that k is a constant of 9*10^9

F/m. The student uses different spheres of radius (r)=(5cm, 10cm, 15cm, 20cm, 25cm). The respective charge values at q=(55pC, 111pC, 165pC, 220pC, 280pC)

From this data, create a plot to determine the value of n.

what is the value of n?

What is the correlation of coefficient of the plot?

A physics student wants to determine the relationship between the radius of a charged conducting sphere and the magnitude of the surface charge. The student suspects a relation of

V=(kq)/(r^n)

Assume that the voltage is held constant at 10V, and that k is a constant of 9*10^9

F/m. The student uses different spheres of radius (r)=(5cm, 10cm, 15cm, 20cm, 25cm). The respective charge values at q=(55pC, 111pC, 165pC, 220pC, 280pC)

From this data, create a plot to determine the value of n.

what is the value of n?

What is the correlation of coefficient of the plot?