Answer: 3/5
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Step-by-step explanation:
Parallel lines have equal slopes, but different y intercepts. Line m has a slope of 3/5, which means line n must also have this same slope in order for the lines to be parallel.
Applying any kind of translation (aka shifting) to these lines will not change the fact that they are parallel. We can say that their parallel property is preserved.
We can think of it like moving the camera around while the paper stays completely still. It will give off the illusion of the lines moving around; however, they will remain parallel.