Answer
$I(5,1)$
Work Step by Step
Use the midpoint formula to find the x-coordinate of point I.
$x_M=\frac{x_G+x_I}{2}$
$2=\frac{-1+x_I}{2}$
multiply each side by 2
$2\times2=\frac{-1+x_I}{2}\times2$
$4=-1+x_I$
add 1 to each side
$4+1=-1+x_I+1$
$5=x_I$
Use the midpoint formula to find the y-coordinate of point I.
$y_M=\frac{y_G+y_I}{2}$
$-1=\frac{-3+y_I}{2}$
multiply each side by 2
$-1\times2=\frac{-3+y_I}{2}\times2$
$-2=-3+y_I$
add 3 to each side
$-2+3=-3+y_I+3$
$1=y_I$
