I need help with this math problem (SCREENSHOT PICTURE INCLUDED)?

Question

http://www.scribd.com/doc/4939832/screenshot-2

Answer 1

Yes

Answer 2

You can use the "vertical line test" to determine if a graph is a function.  Imagine taking a vertical line at each point.  If this vertical line ever crosses the graph *twice* it is *not* a function.  However, in your graph, every value of x will result in only *one* value of y, so it is a function.

Answer:

Yes, the graph is a function.

Answer 3

Yes thats f(x) =  f(x) = -x, when x<-5  and f(x) = x when x>-5,

functio f(x) has only one value of y for every value of y

Answer 4

Yes  

Answer 5

It is a function because when you do the vertical line test throughout the graph, it only touches at one point. If it touches more than one point, it's not a function.  

Answer 6

Yes, no x-value is repeated and that is the definition of a function.

Answer 7

Yes....an absolute value function perhaps....maybe a piece-wise function.