For f(x) = x + 1, f(-1/2) is supposed to be undefined. Is it really undefined, and why is it undefined. I don't understand.

Question

anonymous · Answer

f(x) = x+1 is perfectly well defined everywhere.

strawberry17 · Answer

That 's what I thought, but I am asked to explain why it is undefined.

anonymous · Answer

who said that its undefined.. 
@strawberry17 that might be some confusion

strawberry17 · Answer

"Using complete sentences, explain why f(1) = 2, f(0) = 1, and f(-1) = 0, yet f(-) is undefined." This is what it said exactly.

strawberry17 · Answer

in the f(-) is actually is -1/2

anonymous · Answer

mayb f(x) is defined for just intergers..  if u may recheck the ques..
or else there might be some mistake..

strawberry17 · Answer

I am not sure, but idk, I think there is a mistake. Thanks for your help anyway :)