Answer:
The constant of proportionality would just be 12.9.
Step-by-step explanation:
This equation is already simplified enough to were the constant of proportionality is just the number attached to the x.
This question doesn’t make sense, double check you wrote it right
I converted the four months into a fraction, and got 1/3. There's 12 months in a year, and divided by 4, I got 3.
I searched it up, and this is what it showed, hope it helps