Which could be the entire interval over which the function, f(x), is positive?
х
-3
-2
- 1
0
1
2
3
f(x)
-2
0
2
2
0
-8
-10
-20
(,1)
(-2,1)
O (-0,0)
O (1.4)

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem