(0,6)
1) Since the notation for transformation is read from right to the left. Let's begin with a Translation over that Point.
2) Translation 1 unit to the right, and 1 unit up:
T (x, y) = (x +1, y + 1)
Pre-image | Rule: | Image
P(5,-1) (x +1, y + 1) P' (6,0)
The next transformation is a Reflection. We can see that according to this rule: r(x, y) = (-y,x) this is a Reflection:
Pre-image | Rule: | Image
P(6,0) (-y,x) P" (0,6)
3) Thus the answer is P"(0,6)