Question

Question 6. 6. Which pair of equations represents two perpendicular lines?

(Points : 3)
Option A: -3x+2y=10 and -2x+12

Option B: 2x-5y=45 and y-5/2 x=-9

Option C: x=4y+4 and 4x+4y=4

Option D: 7x+4y=20 and y-3=- 4/7 x

Answer 1

ok, for two lines to be perpendicular, they need to be -1. let be choice a has an example.