Question

I'm having problems on this lesson. Can someone please help me understand it?

Answer 1

Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.

Answer 2

I found the vertex (0,0)

Answer 3

yes

Answer 4

but i need to form the whole equation

Answer 5

you can see that it opens to the left so the y is squared not the x

Answer 6

how do i know it opens to the left.. there's no p

Answer 7

look at the picture of the focus and directrix

Answer 8

ohhh yes the directrix is always on the curve?

Answer 9

all points equidistant from those two
you already found the vertex at \((0,0)\) so you must realize what the picture looks like right?

Answer 10

no the directrix is a line, never on the curve

Answer 11

yes but it's the line beside the curve?