SOLUTION: Is (-2,-1),(1,-6),(5,-1),(8,-9),(11,8) a function? How can I determine by just looking at this?

Algebra ->  Functions -> SOLUTION: Is (-2,-1),(1,-6),(5,-1),(8,-9),(11,8) a function? How can I determine by just looking at this?      Log On


   

Question 1084328: Is (-2,-1),(1,-6),(5,-1),(8,-9),(11,8) a function? How can I determine by just looking at this?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Yes
All the x s are different.
Functions can't happen if there are two y values to the same x. Therefore, if there is no repetition of the x, it has to be a function.