Given: r is inversely proportional to s. If r = 16 when s = 3, then write the formula for the relation between r and s.

a. r = s / 48

c. r = s / 16

b. r = 48 / s

d. r = 16 / s

It being inversely proportionate means that it should be r=n/s, n being any number, this eliminates A and C. To find your n, multiply s and r, getting n=sr = (3) (16) = 48. Putting this into your equation, you get r=48/s, which is answer B.