Which lines are perpendicular?

Line A: y =
1
2
x + 2
Line B: y =
−1
2
x + 7
Line C: y = 2x + 4
Line D: y =
1
2
x +
5
4

Line A: y =
1
2
x + 2
Line B: y =
−1
2
x + 7
Line C: y = 2x + 4
Line D: y =
1
2
x +
5
4
Which lines are perpendicular?

the distance from any point on the parabola to the focus is the exact same as the distance from that point to the directrix.

if you could provide answer choices that might allow me to answer the question easier if my above answer isn't an option! (:

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

answer: you need the equation in the question so i can answer it

step-by-step explanation:

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof