PLS HELP best answer will get BRAINLIEST Please explain your answers thoroughly, show your work

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

How can writing phrases as algebraic expressions you solve problems?