we know that
A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form [tex]y/x=k[/tex] or [tex]y=kx[/tex]
where
k is the constant of proportionality
The constant of proportionality k is equal to the slope of the linear equation
so
[tex]k=0.25[/tex]
The linear equation is
[tex]y=0.25x[/tex]
