Question

What is the constant proportionality of y=5/7x

Answer 1

Answer:  5/7

Explanation:

I'm assuming the equation is $y = \frac{5}{7}x$ which is the same as writing y = (5/7)x.

If so, then the constant of proportionality is the fraction out front: The value 5/7 is the coefficient of the term (5/7)x.

All direct proportion equations are of the form y = kx, where k is the constant of proportionality.  Another example would be y = 12x and this time k = 12.