Question 320525: Can you think of the one linear equation that will not be a function because one x value will correspond to multiple y's? Answer by solver91311(24713) (Show Source):
I can think of an infinity of them. Any equation of the form where is a vertical line where all of the points comprising the line have the -coordinate equal to and the set of -coordinates has a one-to-one correspondence with , the set of real numbers.
If you want a specific linear equation that is not a function, just pick any number that tickles your fancy and substitute it for in
