domain and range

[Guest]

I read the help you all have for domain and range, and it did help a little bit, but what I am mainly having trouble with is how to graph a function in order to get domain and range. PLEASE HELP! :? :? :?

 

[Guest]

the problems that say if the graph of a function f is as shown, determine the domain and range of f.

I cant scan the graph in but this might help you get a better understanding of what im having problems with

 

[tkhunny]

No need for scanning.

Ponder ALL possible vertical lines that intersect the graph. This constitutes the Domain.

Ponder ALL possible horizontal lines that intersect the graph. This constitutes the Range.

Example: x = 4

Only the vertical line, x=4, hits this one. Domain: x = 4.
All horizontal lines hit it. Range: All Real Numbers.

 

[Guest]

?? its graphed in a v shape

 

[tkhunny]

Start drawing horizontal and vertical lines.

 

[Guest]

now im lost start drawing lines where?

 

[Guest]

 

[tkhunny]

now im lost start drawing lines where?

Did you read the first response? I can't tell. Don't panic. Read it a couple of times.