Question: what is the slope of a line perpendicular to a line with slope 7?
Answer: Explanation: This appears to be a bit complicated as normally we say that if slope of a line is m , slope of line perpendicular to it is −1m , which means just take the reciprocal and change the sign. For example if slope of a line is 37 , line perpendicular to it will have a slope of −73 .