The first drawing shows a number line with a closed circle at -4 and an open circle at -2. This represents the interval including -4 but not -2, denoted as [-4; -2).
The second drawing shows a number line with closed circles at both -4 and -2. This represents the interval including both -4 and -2, denoted as [-4; -2].
The third drawing shows a number line with open circles at both -4 and -2. This represents the interval not including -4 or -2, denoted as (-4; -2).
The fourth drawing shows a number line with an open circle at -4 and a closed circle at -2. This represents the interval not including -4 but including -2, denoted as (-4; -2].