Which graph represents the solution to the compound inequality? –6 < 3x – 12 ≤ 9 A number line with an open circle at 2 with a bold line pointing to the left. A point at 7 with a bold line pointing to the right. A number line with an open circle at 2 with a bold line pointing to the right ending at the point at 7. A number line with an open circle at negative 6 with a bold line pointing to the left. A point at 9 with a bold line pointing to the right. A number line with an open circle at negative 6 with a bold line pointing to the right ending at the point at 9.