Write a function rule for the output is 3 greater than 5 times the input. Use x for the independent variable and y for the independent variable

Can someone show me the steps to solve the problem?

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

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.