Answer:
A. 1.88
Explanation:
In less fancy terms, a constant of proportionality is essentially a rate of change - or more specifically, a unit rate.
It's the number we multiply our independent variable by to get the y. You can find this by simply dividing the y value by the x value!
Let's choose the first order pair (2, 3.76).

We can check that this table IS constant by doing the same with the other values... we should always get 1.88!

This is true for all values - which means our constant is 1.88
Hope I was of assistance! #SpreadTheLove<3