The coordinates of the vertices of quadrilateral ABCD are A(−5, 1) , B(−2, 5) , C(5, 3) , and D(2, −1) .
Complete the following sentences.
The slope of AB___, the slope of BC is ____, the slope of CD is____, and the slope of AD is____. Quadrilateral ABCD is a ____ because____.

Word Bank
1) 4/3
2) -2/7
3) -1/3
4) 3/2
5) a parallelogram
6) a trapezoid
7) neither a parallelogram or a trapezoid
8) both pairs of opposite sides are parallel
9) only one pair of opposite sides are parallel
10) neither pair of opposite sides are parallel