What is the correct answer to this. Please help me.

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

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.

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?