Final answer:
The constant of proportionality 'k' in the equation -12 = k(-36) is found by dividing both sides by -36, which gives k = 1/3.
Step-by-step explanation:
To find the constant of proportionality k from the equation -12 = k(-36), we need to solve for k.
We can start by dividing both sides of the equation by -36 to isolate k:
k = -12 / -36
By performing the division, we get:
k = 1/3
Therefore, the constant of proportionality is 1/3.