Before the translation, the coordinates of C are (-1, 2).
If we translate C 3 to the left, it becomes (-1 - 3, 2), or (-4, 2).
If we translate C 9 down, it becomes (-4, 2 - 9), or (-4, -7).
Therefore, the coordinates of C' would be (-4, -7).
<em>Hope this helps! :)</em>