What is the slope of the line perpendicular to the line by y + -5x+9?
A
5
B
-5
C
1/5
D
-1/5
Correct Answer: -5
here given, y = - 5x + 9 we know, y = mx + c here, m = - 5 is slope The line perpendicular will have slope m' = −1m = - (−15) = 1/5