A triangle has coordinates at X(3, 7), Y(6, 7), and Z(4, 2). Dixie transformed the triangle so that the new coordinates were X(-3, -7), Y(-6, -7), and Z'(-4, -2). Which rule best describes this transformation?
1) Reflection over the x-axis
2) Reflection over the y-axis
3) Translation 3 units to the left and 7 units down
4) Translation 3 units to the right and 7 units up
