The lines shown below are perpendicular. If the green line has a slope of -1/9 , what is the slope of the red line? A. 9 B. 1/9 C. -9 D. -1/9

Question

asked May 17, 2017 119k views

2 Answers

Dave Harding · Answer 1 · 2017-05-22T09:50:40+0000

Answer: A. 9

Explanation:

Given: The red line and the green line are perpendicular to each other.

The slope of green line =
(-1)/(9)

We know that the product of slopes of two perpendicular line is -1.

Let m be the slope of red line ], then we have

$(-1)/(9)* m=-1\\\\\Rightarrow\ m=(9)/(1)=9$

Hence, the slope of the red line = 9.