line c has a slope of 5/9 and d is perpendicular to c what is the slope of line d simplify your answer and write it as an improper fraction and proper fraction or integer
Since line d is perpendicular to line c, the slope of line d is the negative reciprocal of the slope of line c.
Therefore, the slope of line d is -9/5.
Simplified as an improper fraction, this is -9/5.
Simplified as a proper fraction, this is -1 4/5.