1.)The domain for relation R is the set {1,2,3,4,5,6}, and R = {(a,b) | a divides b}, select all of the following ordered pairs that are in R.

a)

(1, 3)

b)

(2, 5)

c)

(3, 6)

d)

(5,6)

2.) The domain of the relation L is the set of all real numbers. For x, y R, xLy if x < y. L is

a)

reflexive

b)	anti-reflexive

c)

neither

3.) The domain of the relation L is the set of all real numbers. For x, y R, xLy if x < y. L is

a)

symmetric

b)	anti-symmetric

c)

neither

4.)The domain of the relation L is the set of all real numbers. For x, y R, xLy if x < y. L is

a)	transitive

b)	not transitive

5.)Assume that (a, b), (b, c), (c, d), (d, e), and (e, a) are edges in a digraph. is a? There may be multiple answers.

a)

walk

b)

circuit

c)

path

d)

cycle

6.) Here are two relations defined on the set {a, b, c, d}:

S = { (a, b), (b,c), (d, a) }

R = { (a, a), (b, c), (b, d) }

Which of the following ordered pairs are in R S? There might be multiple answers.

a)

(a, c)

b)

(a, d)

c)

(b, d)

d)

(b, a)