What I See: 9 Balls

What I See: 9 Balls
The Answer
1) Split the balls into 3 groups of 3 balls each.
2) Weigh 1st & 2nd group against each other to see if the heavier ball is part of them.
3) If the scale balances, then the 3rd group has the heavier ball. Or whichever side the scale weighs heavy, has the heavier ball.
4) Take that heavy group. Take only 2 balls from this group.
5) Weight the 2 balls against each other. Apply the same logic.