Question

If the equation y=5/7x describes a proportional relationship between x and y, what is the constant of proportionality?

Answer 1

It is `5/7`

Explanation:

The number `5/7` tells you that when `x` increases of `1` then `y` always increases of `5/7`.
Graphically:
graph{7/7*x [-10, 10, -5, 5]}