The slope of a line is

Question

The slope of a line is −7. What is the slope of any line parallel to this line? (If an answer is undefined, enter UNDEFINED.)

The slope of a line is 5/2. What is the slope of any line perpendicular to this line? (If an answer is undefined, enter UNDEFINED.)

Answer 1

The slope of parallel lines are equal. If the slope is -7, the slope of the line parallel to it is also m=-7

The slope of perpendicular lines at negative reciprocals. If the slope is 5/2, the slope of the line perpendicular to it is m=-2/5