Suppose the Relationship Between Resting Heart Rate (RHR, in Beats/min)

Suppose the relationship between resting heart rate (RHR, in beats/min) and body weight (W, in grams) is: RHR = aW^‒0.23. What can be deduced from this relationship?

A) There is no systematic relationship between heart rate and weight, but large animals have faster heart rates.
B) Heart rate tends to be faster for small animals.
C) Heart rate tends to be exponentially slower for animals weighing 23 g, 230 g, 2300 g, and so on.
D) Heart rate tends to be faster for larger animals.