# If line 1 has a slope of 2/5, how do you find the slope of line 2 if the two lines are parallel?

The slope measures the "slant" of a line. Two lines are parallel if they has the same "slant" (or if neither is "slanted".)

So, two lines are parallel if they have equal slopes (or if neither line has a slope -- that is, if both are vertical.)

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If two lines are parallel, they have the same slope. Therefore, if line 1 has a slope of 2/5, then line 2, being parallel to line 1, also has a slope of 2/5.

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