The lines shown below are parallel. if the green line has a slope of -, what is the slope of the red line?

You're missing some info here, but parallel lines have the same slope. So whatever the slope of the green line is, that is also the slope of the red line. 

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.