Question

Use the graph of y = f(x) to graph the given function g.

Answer 1

g(x) = -2f(x)

Answer 2

You would have to post the actual equation or the graph that went with it.

Answer 3

It doesnt have one main graph, they've just shown 4 different graphs to chose from

Answer 4

But this is the equation, g(x) = -2f(x)

Answer 5

there should be a graph of F(x) that you would use to find G(x)

Answer 6

Nope, I have 4 answer choices & on each choice is a different graph.
& thats all the graphs I have on the page

Answer 7

can i see it?

Answer 8

Sure, screenshot of the whole page or each individually?

Answer 9

whole page would be great.

Answer 10

Top half,

Answer 11

& bottom half,

Answer 12

ok so the dark line is f(x) and the dotted line is g(x)

Answer 13

Got it,

Answer 14

crap oops.

Answer 15

C?

Answer 16

the thing says g(x)=-2f(x)

Answer 17

one sec ill check

Answer 18

No.

Answer 19

Ah.

Answer 20

Where did the 1/2 come from?

Answer 21

ill just say it a different way. g=-2f(x) so if we look at any point for f(x) then there is a point for g(x) where the y value has been multiplied by -2

Answer 22

one of f(x)'s points was (6,6) so for g(x) that point would be (6,-12).
(x,y)

Answer 23

Im confused

Answer 24

I hit best response outta need for a like button.

Answer 25

so g(x)=-2f(x)=-2y so you multiply the y values for f(x) by -2, but keep the same x values. so pick a point off of f(x).

Answer 26

Haha if only if were like facebook.
I've always had a hard time mathematics in the past, I could never get it through to my head.

Answer 27

What do you mean by pick a point of of f(x)?

Answer 28

You have a graph of f(x). It is the dark one. Pick one of those dark dots on the dark line. They have coordinates. (x,y) pick one and tell me the coordinates.

Answer 29

B is(-6,-4), (-4, 2), (-1,1), (6,6)

Answer 30

right! so they are (x,y) and we know g(x)=-2f(x). When you multiply a function(f(x)) by a constant it is like multiplying the y numbers by -2.

Answer 31

so (-6,-4) becomes (-6,8)

Answer 32

\[-4 *-2 =8\]

Answer 33

Got it,

Answer 34

So you take that point(-6,8), it is part of g(x), and find a graph that matches. If there is more than one graph with the point then do another point.

Answer 35

does one of the dotted g(x) graphs have that point?

Answer 36

D

Answer 37

I think so.

Answer 38

Was it right?

Answer 39

One second,

Answer 40

Yes, D was correct. =]

Answer 41

Oyeah!!!

Answer 42

Haha thank you for the help. =]

Answer 43

Yw. ;)