Select the pair of equations whose graphs are perpendicular.

A.
3x + 6y = 8
y = 2x – 8

B.
2y = –3x + 5
2x + 3y = 4

C.
2x – 8y = 9
12x – 3y = 7

D.
y = 2x – 7
x + y = 3

Question

Select the pair of equations whose graphs are perpendicular.	
 
 A.
3x + 6y = 8
y = 2x – 8
 
 B.
2y = –3x + 5
2x + 3y = 4
 
 C.
2x – 8y = 9
12x – 3y = 7
 
 D.
y = 2x – 7
x + y = 3

anonymous · Answer

more math trouble

nikato · Answer

try finding the slope of each equation. if the pair of slopes are negative recipricol of each other, then they are perpendicular

anonymous · Answer

okay....but i'm confused on how do find it. i know how to find the slope it's just these i ahve trouble with

nikato · Answer

ok. then start with A. what did u get for the slope for each of those

anonymous · Answer

still working on it hold on

anonymous · Answer

-2/1 right?

anonymous · Answer

for A

nikato · Answer

|dw:1388963824073:dw|ok what would be the slope