Let H (6, 7) be (x₁, y₁) and I (-7, -6) be (x₂, y₂)
Mid point = [tex][ \frac{x_1+x_2}{2}, \frac{y_1+y_2}{2}] [/tex]
Mid point = [[tex][ \frac{6+-7}{2}, \frac{7+-6}{2}] [/tex]
Mid point = [tex][ \frac{-1}{2}, \frac{1}{2}] [/tex]
Santiago is not correct, the mid point is (-0.5, 0.5)