Answer:
The slope of the green line (and of the red one as well) is:
Enter it as 1/5 as suggested
Explanation:
Recall that parallel lines have the same slope. Therefore we can find the slope of either line and that will be the slope of the other line as well.
So if we use the two point given on the red line: (5,4) and (0,3)
We can find the slope of the segment joining them via the slope equation: