What are the coordinates of the image of vertex f after a
reflection across the line y=-x?
(-1,-3)
(3,-1)
(1,3)
(-3,1)
g(-2. -3)
f(1.-3)
e -1, -5
h(2-5)

This takes too long to do. I will provide the steps.

For each point given, plug into the equation y = - x.

Point 1:

(-1, -3)

y = -x

y = -(-1)

y = 1

The first point reflected across the line y = - x is (-1, 1).

Do the same with the remaining points.

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.