Seven times a number minus the number is -48. find the number

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.

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.

If f(x)=1/x and g(x)=x+4 which of the following is the graph