9. Jessica gathered and graphed data about different packages of candies, where x is the
number of packages of candy, and y is the
weight in grams. Jessica created a line of best
fit for the data, as shown below.
100
80
:
60
40
20
8 12 16 20 24
Using Jessica's line of best fit, how many grams
would 50 packages of candy weight

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.