A little late, but it's not per slice... It's per 2 slices I think. Check the domino's website, it has all the nutritional info.
It says "per serving consumed" and then that the Garlic pizza bread serves 2. , I got 7 pro points for it, so its either 7 for half and 14 for the whole, or 7 for the whole and 3 1/2 (4) for half...
People are saying the garlic dip is 6 pp whereas when i calculated it off the site I got 2PP.