Is it ever possible for the domain and range in a function to have different numbers of entries (for example, 3 domain entries to 5 range entries, or 2 range entries to 7 domain entries)? What happens when this is the case?

Question

anonymous · Answer

@miamilove14 @undeadknight26  PLEASE HELP!!!

undeadknight26 · Answer

at your service!

undeadknight26 · Answer

what like 3, 7 and 2,7?

anonymous · Answer

What happens when this is the case?

undeadknight26 · Answer

if this is just a simple point it is just graphed.

anonymous · Answer

Yes, there can be a different number of entries--but if it's a function, one of the cases you describe isn't valid.

anonymous · Answer

yes 
consider: 
y = x² 
so 
domain: all real numbers 
range: y ≥ 0 

so for any given value of y (except 0) 
there are two values of x 
i.e. 
let x = 1 
then 
y = ±1 
since (1)² = 1 and (-1)² = 1 

yet 
y = x² is still function 
because for any given value of x (except 0), there is only one y-value.

undeadknight26 · Answer

ohhh best response right there...

anonymous · Answer

Okay thanks you guys, you helped a lot :D

anonymous · Answer

anytime