1 permission
A recipe says to use 2 teaspoons of vanilla to make 36 muffins. What is the constant of
proportionality that relates the number of muffins made, y, to the number of teaspoons of
vanilla used, x? (7.4C, SS, RC2)
A 36
B 18
C 2
D 0.5

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.