Answer:
see explanation
Step-by-step explanation:
The equation of 2 quantities in direct proportion is
y = kx ← k is the constant of proportionality
1
y = - 4x ← in standard form
with k = - 4
2
[tex]\frac{y}{x}[/tex] = 2 ( multiply both sides by x )
y = 2x ← in standard form
with k = 2
3
[tex]\frac{x}{y}[/tex] = 3 ( multiply both sides by y )
x = 3y ( divide both sides by 3 )
[tex]\frac{1}{3}[/tex] x = y ← in standard form
with k = [tex]\frac{1}{3}[/tex]
