Which distance measures 7 units? a number line going from negative 8 to positive 8. A closed circle appears at negative 7 and is labeled l. A closed circle appears at negative 1 and is labeled m. A closed circle appears at positive 2 and is labeled n. A closed circle appears at positive 6 and is labeled p. An orange arrow line is above the number line with an arrow pointing left passed negative 7 and right passed positive 6. It contains all points.