Final answer:
The equations that represent a proportional relationship are y = kx, A = lw, and d = rt.
Step-by-step explanation:
In order to determine which equations represent a proportional relationship, we need to look for equations in the form y = kx, where k is the proportionality constant.
Out of the given equations, the ones that represent a proportional relationship are:
- A. y = kx
- C. A = lw
- D. d = rt