Question

The intensity of light from a light source varies inversely as the square of the distance from the light source. Write an equation for the variation. Use k as the constant, i for the intensity of the light, and d for the distance.

Answer 1

\[i = k/\sqrt{d}\]

Answer 2

That's wrong. But you might not be able to tell since they didn't actually explain!

Answer 3

I think I got it. i=k/d^2?

Answer 4

Yes, that is correct. The distance squared is d^2.