Th grade 10 and Grade 12 class officers are sponsoring a graduation celebration the total cost for the facilities and catering is AED 45 per person plus a AED 2,500 deposit write and graph an equation to represent the average cost per person then explain any limitations to the domain range

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.