Can someone solve this math problem ​

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

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.