Question

For the function f(x) = –2(x + 3)2 − 1, identify the vertex, domain, and range.

The vertex is (3, –1), the domain is all real numbers, and the range is y ≥ –1.
The vertex is (3, –1), the domain is all real numbers, and the range is y ≤ –1.
The vertex is (–3, –1), the domain is all real numbers, and the range is y ≤ –1.
The vertex is (–3, –1), the domain is all real numbers, and the range is y ≥ –1.

Answer 1

@Vocaloid por favor

Answer 2

given the function

y = (x-h)^2 + k

the vertex is (h,k)

Answer 3

.... so its A?

Answer 4

read carefully

if (x-h) = (x+3), what is h?

Answer 5

3

Answer 6

nope, think carefully

x - h = x + 3

subtract x from each side, what do you get?

Answer 7

-3?

Answer 8

You divide it by negative h?

Answer 9

right, so h = -3 and our vertex is (-3,-1)

Answer 10

now, to find the range, we can see that the graph is a downward parabola, so our range is y <= -1

Answer 11

okay

Answer 12

wouldn't it be C?

Answer 13

good, yes

Answer 14

omg thank you Senpai

Answer 15

I gave you medal for being Kawaii

Answer 16

pfff lol

Answer 17

Much fan

Answer 18

thanks ^_^