Question

What is the equation of the quadratic graph with a focus of (5, 6) and a directrix of y = 2?
f(x) = 1/8 (x + 5)^2 + 4
f(x) = 1/8 − (x − 5)^2 + 4
f(x) = 1/8 (x − 5)^2 + 4
f(x) = 1/8 (x + 5)^2 − 4

Answer 1

@Shadow

Answer 2

c

Answer 3

I don't take direct answers...could you explain why?

Answer 4

I think its A. Let me explain

Answer 5

Yes, please. XD

Answer 6

Both (5,6) are both positive numbers. While C. has a negtaive in it A does not

Answer 7

Oh, i forgot the squares... XD

Answer 8

sigh...

Answer 9

Does it still apply? XD

Answer 10

I still would go with (A)

Answer 11

All right. Thanks for making an attempt to explain. XD

Answer 12

Watch out, it isnt A

Answer 13

Youch. XD
Which one would it be, Dude?

Answer 14

i knew it xd

Answer 15

@dude

Answer 16

https://www.desmos.com/calculator/mzftnu0esl

Answer 17

A has a focus of (-5,6)

Answer 18

(All choices, maybe this helps)
https://www.desmos.com/calculator/sk51k6vwnt

Answer 19

Oh. So...could it be the third one? I mean, i still don't understand this. XD

Answer 20

Yes, it would be C

The focus is always on the same point of the vertex & the directrix is a horizontal line below the parabola (in general terms)

Answer 21

i tried lol.

Answer 22

Ah, ok. Thanks m8.

Answer 23

Cupcake, it would've been nice to explain it to me like dude did instead of giving a direct answer.

Answer 24

But thanks anyway, dude. XD

Answer 25

well next time i will okay ?

Answer 26

Great.