Question

Line b passes through points (9, 10) and (4,1). Line c is perpendicular to b. What is the

slope of line c?

Answer 1

-5/9

Explanation:

the slope of line b is 9/5

because (10-1)/(9-4)=9/5

a perpindicular line has a slope opposite and inverse of the other one, so the slope of c is -5/9