You’d be adding 5,-0.5 to the respective coordinates. Point F’ is located at -1,-1 so you’d be adding 5 to -1 for the x coordinate and -0.5 to -1 for the y coordinate.
for ex: the reciprocal of 3/4 is 4/3. it is the opposite.
reciprocal definition:
a mathematical expression or function so related to another that their product is one; the quantity obtained by dividing the number one by a given quantity.