Choose the graph of the solution to this inequality. –6x < 21 A number line with a closed dot at negative 3 point 5 shaded to the left. A number line with a closed dot at negative 3 point 5 shaded to the right. A number line with an open dot at negative 3 point 5 shaded to the left. A number line with an open dot at negative 3 point 5 shaded to the right.