Answer:
The given equation is
y =[tex]\frac{3}{7}[/tex] x
→ [tex]\frac{y}{x} = \frac{3}{7}[/tex]
reciprocating both sides, we get
→ [tex]\frac{x}{y} = \frac{7}{3}[/tex] ............(1)
→ Here x and y are Directly proportional to each other.
which means ,
→ x = k y , where k is constant of proportionality.
Or , [tex]\frac{x}{y}[/tex] = k ............................(2)
Equating (1) and (2),
k = [tex]\frac {7}{3}[/tex]