Question

Which equation has a constant of proportionality equal to 0.25

Answer 1

we know that

A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form $y/x=k$ or $y=kx$

where

k is the constant of proportionality

The constant of proportionality k is equal to the slope of the linear equation

so

$k=0.25$

The linear equation is

$y=0.25x$