Question

please check my answer of vertex of the parabola?

Answer 1

it it (1,2)

Answer 2

@ganeshie8

Answer 3

yes, that is correct.

Answer 4

thank you

Answer 5

Now, could you find the equation of the directrix?

Answer 6

ok i know the formula

Answer 7

but how do you find 1/4a

Answer 8

You don't need that to answer my question. Just look at the directrix. Determine which x value describes this vertical line.

Answer 9

is it 1/4(1) because of the vertex??

Answer 10

No. Please look at the diagram again. You see a parabola, in red. You see a vertical line, also in red. That red line goes thru which x value?

Answer 11

its -1 ?

Answer 12

is this the formula
x−h=14a(y−k)


where (h,k) is the vertex

Answer 13

@mathmale

Answer 14

i mean 1/4a

Answer 15

????

Answer 16

its -1 ? yes, the directrix goes thru x=-1.

Next question for you: Is this parabola a vertical or horizontal one?

Answer 17

i'm sorry i'm just slow in math..on top of that homeschooled :/

Answer 18

Emma, you can learn. No doubt about it. Please don't bother to share statements like that, because they don't help you or help anyone else.

Answer 19

its a vertical parabola..

Answer 20

lol!

Answer 21

LOL. I'm working with several students at the same time and obviously got mixed up.
Unfortunately, your response to "vertical?" "horiz.?" was incorrect. What were you looking for when you decided upon an answer to that?

Answer 22

what why isnt it vertical?

Answer 23

isnt it supposed to look like a sun when horiz

Answer 24

I invite y ou to go into the Draw utility (button below) and draw what you think is:

1. A horiz. parabola (a parabola that opens to the left or to the right)

2. A vertical para: (a para. that opens up or down.).

Answer 25

ooooh!! i get it

Answer 26

sun on the horiz? Nope. Not for a vertical para. Please get busy and draw the two diff. parabolas I've listed.

Answer 27

I've looked all over the place but can't find your drawings.