Let $A$ and $B$ be two points on the hyperbola $x ^ { 2 } - \frac { y ^ { 2 } } { 9 } = 1$. Which of the following four points could be the midpoint of segment $AB$? A. $(1,1)$ B. $( - 1,2 )$ C. $( 1,3 )$ D. $( - 1 , - 4 )$
Let $A$ and $B$ be two points on the hyperbola $x ^ { 2 } - \frac { y ^ { 2 } } { 9 } = 1$. Which of the following four points could be the midpoint of segment $AB$?\\
A. $(1,1)$\\
B. $( - 1,2 )$\\
C. $( 1,3 )$\\
D. $( - 1 , - 4 )$