The formula d = rt is used to calculate the distance an object travels over a period of time, t, at a constant rate, r. Based on this formula, what is the rate, r, in terms of d and t ?

A) r=\frac{d}{t}
B) r=dt
C) r=\frac{t}{d}
D) r=d-t
Test ID: 401
Source: 2016 PSAT/NMSQT Student Guide: Practice Test #2