Does the commutative property of addition apply when you add two negative integers?

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

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.