Direct variation equation is y=kx . Your k is your variation or you could look at it as your slope. y=kx Plug in what you know, 4=k12 Divide both sides by 12 to cancel out your 12 that is being multiplied by k.
4(/12)=k12(/12) Simplify
1/3=k
y=1/3x This is your direct variation equation.
Answer:
Step-by-step explanation:
1) y=kx
plug in the #s
(0.9)=k(0.1)
divide both sides by 0.1
k=9
plug in k and that is your equation (y=9x)
