Question

Find the directrix of the parabola
y= 1/4 (x-1)^2+3

A) y = 2
B) y = -1
C) y = -4
D) x = 2

Answer 1

i know its not B

Answer 2

Put the equation in the form x^2=4py

Answer 3

is it D

Answer 4

Did you rearrange it like I said?

Answer 5

i dont know how and it is past midnight im extreamly tired

Answer 6

Multiply both sides by 4

Answer 7

Then why don't you go to bed?

Answer 8

And try again in the morning when your mind is clear?

Answer 9

i have to finish this. i only have 7 questions

Answer 10

Its either A or D im sure

Answer 11

If you multiply both sides by 4 you will get:
\[4y=(x-1)^2+12\]

Answer 12

ok so it A ?????

Answer 13

so 4p=4 and p = 1. Since this parabola is concave upward, the focus is p units above the vertex and the directrix is the horizontal line that is p units below the vertex.

Answer 14

What is the vertex?

Answer 15

i have no idea

Answer 16

theres no point in teaching someone with memory loss how to do this crap. im never going to remember it anyway

Answer 17

Vertex is (1,3)

Answer 18

No wonder the US is 28th in math in the world with that kind of "I can't" attitude.

Answer 19

wow you suck