Answer: (1/2, -1)
Step-by-step explanation: The coordinates of point S can be found using the midpoint formula for the hypotenuse RT, since S is the midpoint of RT. The midpoint formula is:
Midpoint of RT = ( (x1 + x2)/2 , (y1 + y2)/2 )
Using the coordinates of R and T, we get:
Midpoint of RT = ( (-1 + 2)/2 , (1 - 3)/2 )
= (1/2, -1)
Therefore, the location of point S is (1/2, -1).