A line contains (4,2) and (0,-1). What is the equation line?

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

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.