To translate a figure to the left by 6 units and up by 5 units, you will modify the coordinates of each vertex as follows:
- To move left by 6 units, you subtract 6 from the x-coordinate.
- To move up by 5 units, you add 5 to the y-coordinate.
Therefore, the effect on the coordinates of the vertices can be described as:
Subtract 6 units from each x-value and add 5 units to each y-value.
So the correct answer is: Subtract 6 units from each x-value and add 5 units to each y-value.