The Change in Capital Stock Per Worker (∆K) May Be

The change in capital stock per worker (∆k) may be expressed as a function of s = the saving ratio, f(k) = output per worker, k = capital per worker, and δ = the depreciation rate, by the equation:

A) ∆k = sf(k) /δk.
B) ∆k = sf(k) × δk.
C) ∆k = sf(k) + δk.
D) ∆k = sf(k) - δk