Question

Select the pair of equations whose graphs are perpendicular.

5x – 8y = 9
12x – 5y = 7

x + 6y = 8
y = 2x – 8

y = 2x – 7
x + 2y = 3

2y = –3x + 5
2x + 3y = 4

Answer 1

If you convert the third pair to standard form, you'll see that their respective slopes are 2 and -1/2. This is the only requirement for being perpendicular; the slopes have to be opposite(negative) reciprocals.\[y=2x-7\]\[y=-\frac{1}{2}x+1.5\]

Answer 2

so its the third one? @bagajr

Answer 3

yeah