Question

Graph each function. Identify the domain and range.
-3x if x <_ -4
f(x)= x if 0 < x <_ 3
8 if x > 3
Help!!!

Answer 1

how far did you get

Answer 2

What do you mean?

Answer 3

How to answer these?

Answer 4

I really am desperate to learn this coz i really dnt know anything about graphing

Answer 5

this is a piecewise function, so you graph each piece to graph the overall piecewise function

Answer 6

Yeah i dont know. :(

Answer 7

how would you graph the first piece

how would you graph y = -3x

Answer 8

Thats what i dont know.

Answer 9

when x = 0, what is y?

Answer 10

Imreally need help on this one

Answer 11

I am helping,

y = -3x

y = -3*0 ... plug in x = 0

y = ???

Answer 12

How couild i plug to 0 oh i get it on the left side? Or down?

Answer 13

look it how I replaced x with 0

Answer 14

you then evaluate and simplify

Answer 15

Ill identifynthe domain and range first then ill do graphing but first i really dont understand what are u talking about

Answer 16

y = -3x

y = -3*0 ... plug in x = 0 (ie replace x with 0)

y = ???

Answer 17

-3?

Answer 18

-3 times 0 is equal to -3?

Answer 19

0

Answer 20

yes, so when x = 0, y = 0

Answer 21

when x = 1, what is y?

Answer 22

1?

Answer 23

y = -3x

y = -3*1 ... plug in x = 1 (ie replace x with 1)

y = ???

Answer 24

-3 plug graph?

Answer 25

when x = 2, y = ???

Answer 26

2

Answer 27

no

Answer 28

use the equation we've been using

Answer 29

1?

Answer 30

no, the equation is y = -3x and you replace or plug in x = 2

Answer 31

Then

Answer 32

plug it in and tell me what you get

Answer 33

What do you mean what i get on the graph?

Answer 34

Cnan u draw i really cant i need to see an explanation

Answer 35

to graph y = -3x, plot the two points (0,0) and (1,-3)

then draw a line through them

Answer 36

each point is found by plugging in a number for x to get a corresponding number for y

Answer 37

I dont have an idea to graph

Answer 38

But i think i got it just help me with the domain and range

Answer 39

you're just plotting those points, then drawing a line through them

Answer 40

How about domain and range

Answer 41

what does your graph look like

Answer 42

Just connecting the points and 0 to 0 just infnity

Answer 43

can you draw it out to show me what you got?

Answer 44

How will i draw a graph here?

Answer 45

I still have like 14 questions to answer. :(

Answer 46

use the draw button under the message box

Answer 47

I'm using ipad i think there is no draw button.

Answer 48

really? hmm how odd

Answer 49

try scrolling down maybe?

Answer 50

There is no draw button

Answer 51

alright

Answer 52

well the domain and range is found by looking at the graph

Answer 53

and determining which x values are allowed and which y values are possible

Answer 54

0,0 -2,2?

Answer 55

-3 i mean

Answer 56

look at your graph, which x values are not allowed

Answer 57

What do you mean are not allowed i dontnreally get it 😂

Answer 58

which values can you not plug in the function

Answer 59

What?

Answer 60

what is the definition of domain

Answer 61

All x values?

Answer 62

Get it!

Answer 63

what about the x values

Answer 64

How can i write the piecewise function can undraw for me an example with an answer

Answer 65

have a look at this page

http://www.mathsisfun.com/sets/domain-range-codomain.html

and it explains what domain and range is

Answer 66

Inreally dont have future woth his one ill let this pass for now

Answer 67

have a look at that page a few times

Answer 68

How about f(x)=[x]-6

Answer 69

and anything you need graphed, you can use geogebra to help you do it

Answer 70

I dnt have an idea how to answer that

Answer 71

well you just need a bunch of points, plug in values of x to get output y values

Answer 72

and is that supposed to be f(x) = |x|-6

Answer 73

Okay what points should i plug?

Answer 74

any x values you want (keep them small preferably)

Answer 75

Whats my 6b

Answer 76

Y i mean

Answer 77

6b?

Answer 78

not sure what you're asking

Answer 79

Inhave x value whats my y value

Answer 80

what's your x value

Answer 81

0.5

Answer 82

ok so replace x with that value

then evaluate

Answer 83

Ok nevermindni really cant do this. Nex time