Heeelp!! Henry loves to play the piano but doesn't like practicing the exercises his piano teacher assigns. Henry knows the exerc
ises will help him play better though, so he tries to
motivate himself using his favorite treat - chocolate chip cookies. There is a proportional relationship between the am
ount of time (in hours) that Henry practices the piano,
x, and how many cookies he gives himself. y.
When Henry practices for 3 hours, he gives himself 9 cookies.
Write the equation for the relationship between x and y.