Answer:it would be C.
Explanation:
6-(-6)=12 and 5-(-3)=8, so if you put it in the fraction, it would end up as 3/2.
3-(-3)=6 and 3-(-1)=4, and 6/4 simplified is 3/2. If both slopes are 3/2, then they would be parallel, showing that the two lines have the same slope. Another way to prove is that 3/2=3/2 is true