Question

graph each function then identify the domain and range of the function.

y=-4x^2

Answer 1

hello im not sure exactly how to set this up these are quadratic functions by the way

Answer 2

The domain is (-∞,∞), while the range is (-∞,0)

Answer 3

how did you get that though?

Answer 4

the domain is all possible values of x. when you graph a quadratic, you will end up with a parabola

Answer 5

did you get those coordinates

Answer 6

did you use -2 0 and 2

Answer 7

no, the graph is just a sketch of what it would look like, if it were graphed

Answer 8

ok so if you were to graph it though thats how it would look like because i need to graph

Answer 9

it by the coordi

Answer 10

coordinates sorry my computer is going craxy now lol

Answer 11

im soo sorry

Answer 12

ok so how will i actually graph it?

Answer 13

so, the graph of a quadratic equation will be a parabola. do you know what a parabola is?

Answer 14

yes it is the u shape on the graph

Answer 15

a quadratic written in standard form ax^2 + bx + c = f(x)
will have vertex (-b/2a , f(-b/2a))

y = -4x^2
has:
a = -4
b = 0
c = 0

so the vertex is at (0,0)
Then, since a is negative, we know that the parabola will open downward.

Answer 16

ok so the vertex is at 0 and the parabola is facing down when we graph

Answer 17

The graph I drew was just a sketch. Here you go:

Answer 18

do you have any questions?

Answer 19

ok so when graphing i will take -4 and put 1in x so i get -4(1)^2 and i will solve to get -4 and i will do the same with 2 so i get -16 and i will get the graph

Answer 20

example\