A triangle with a vertex (−3, 5) is translated up 6 units. What are the coordinates of this vertex after it is translated?

To translate a point up 6 units, we add 6 to the y-coordinate of the point.

Therefore, the coordinates of the vertex after it is translated are:
x-coordinate: -3
y-coordinate: 5 + 6 = 11

Thus, the coordinates of the vertex after it is translated are (-3, 11).