Question

HELP!! which of the following represents a function? and how can you tell. (a.) x^2+y^2=49 (b.) y=lxl (c.) x=[[y]] (d.) x=y^2

Answer 1

What is x=[[y]]?

Answer 2

how did you come to that conclusion?

Answer 3

No, I'm asking.

Answer 4

thanks for the help...

Answer 5

I can see that a, c and d are functions, but I'm unsure what the [[y]] notation is.