we have that
The rule of the reflection over the line y=-x
is giving by
(x,y) -------> (-y,-x)
we have the coordinates
(0,0)
(7,-3)
(-1,-4)
Apply the rule of reflection
(0,0) ------- (0,0)
(7,-3) -----> (3, -7)
(-1,-4) ----> (4,1)
therefore
the answer is
?=3
the coordinates of triangle are
(0,0)
(7,-3)
(-1,-4)
you must apply the rule of reflection at each coordinate
(0,0) ------- (0,0)
(7,-3) -----> (3, -7)
(-1,-4) ----> (4,1)
The question ask for the number where the sign ? is
In this location there is the number 3
