Question

The rate of growth of mass of a tumor, m, with respect to time t, is inversely proportional to the square of the mass. The differential equation that best describes this relationship is which of the following?

Answer 1

I thought it was just 1/m^2 but in the answer choices I see a k everywhere.
What does the k mean

Answer 2

k stands for a constant

Answer 3

the differential equation is
dy/dt = k/m^2

Answer 4

So I just have to multiply k?

Answer 5

correct

Answer 6

in general if 'y is proportional to x', then y = k*x

Answer 7

Oh i see. when you derive both sides the k stays. I got it thanks